Martin O'Neill’s tenure at Celtic is undeniably storied; the 74‑year‑old Irish manager has become a beloved figure at Celtic Park. Yet recent events have sparked a debate among fans and pundits: does the club need a fresh direction before its current struggles morph into a full‑blown crisis? O'Neill has already hinted that he will take stock of his position after the 1‑0 defeat to Rangers at Parkhead, saying he may decide whether it is "time to wrap it up." That loss was the second setback at the hands of their Old Firm rivals within a single week, a week that also saw Celtic fall 3‑1 to Ferencváros in the Europa League. Both matches exposed unsettling patterns that have left supporters uneasy about the remainder of the campaign, especially with the international break looming.

The season began on a promising note. Celtic opened their title defence with six consecutive league victories, but even those wins were occasionally unconvincing.

The most glaring reminder of the team’s fragility came in the Champions League play‑off against LASK. After building a 4‑0 advantage, Celtic ultimately went out 5‑4 on aggregate, a collapse that raised serious questions about O'Neill’s tactics and the squad’s mental resilience. The following weekend, Celtic suffered a humbling defeat to Rangers in the Scottish League Cup, and the disappointment was compounded by a lacklustre showing in the Europa League.

The 1‑0 loss to Rangers in front of 60,000 home fans was the final straw for many. While the club still sits atop the Scottish Premiership heading into a three‑week international hiatus, the cushion is a precarious two points rather than the eight‑point lead that would have signalled dominance.

Blaming the manager alone would be simplistic. Celtic’s challenges run deeper than a single set of results. Last season, supporters staged protests against the board, demanding structural change. Those grievances have not disappeared.

Critics have also scrutinised the timing and quality of the summer signings. The club splashed cash on record‑breaking acquisition Kasper Høgh, alongside newcomers Camilo Duran, Mika Baur and Haissem Hassan, all arriving before the Champions League exit. Additional players were added late in the transfer window, leaving O'Neill to integrate a flood of fresh faces mid‑season. Finding the right balance has proven elusive.

O'Neill experimented with a variety of midfield options without finding a formula that works. In the most recent Old Firm clash he even abandoned his usual wingers, opting for a five‑defender line and pushing Kieran Tierney further forward.

The result was the same: a narrow defeat that did little to inspire confidence. Celtic’s domestic dominance—14 league titles in the last 15 seasons—has often been achieved without adequately replacing key players who have moved on. Some fans argue that this sustained success has bred complacency at the board level, and the rising competitiveness of Rangers and Hearts now threatens that comfortable status quo. The sizable summer outlay has raised expectations, and many fear that a trophy‑less season would send a clear message: financial muscle alone cannot substitute for the right personnel on the pitch.

Scottish football is notorious for its rapid swings in fortune. O'Neill’s previous interim spell last season saw him steady a floundering side and deliver an unlikely league‑and‑cup double, earning him a permanent appointment 21 years after his first tenure ended. During that earlier spell he amassed seven major trophies and guided Celtic to a UEFA Cup final in 2003, establishing a reputation as a manager capable of building an almost impregnable side. The contrast between those high‑water marks and the current level of performance is stark, prompting even the most loyal supporters to wonder whether it might be time for O'Neill to step aside.

The manager’s recent tactical adjustments have not yielded the desired turnaround. After the Ibrox loss, he made bold changes ahead of the Europa League tie with Ferencváros, only to see those tweaks fail. Further alterations for the subsequent Rangers match produced the same disappointing outcome. While O'Neill still possesses the experience to replicate past successes, failing to resolve the squad’s core issues could result in a season without silverware and a blemish on his legacy.

Amid the gloom, it is easy to forget that Celtic remain league leaders. After the latest defeat, O'Neill told Sky Sports that he does not believe there is "very much between the teams" and emphasized that the club’s history guarantees a fight back. He called for perspective, asking, "Is it a disaster?

I don't think so. We have to rethink and reset." His optimism is not unfounded; the season is still in its infancy. Celtic have played only seven of their 38 Premiership fixtures and still have seven Europa League games to contest.

The current turbulence could still resolve into another successful campaign. Upcoming fixtures include a home clash with Motherwell on October 11, a Europa League night against Benfica on October 15, a league encounter with Hearts on October 18, another European tie versus Celta Vigo on October 22, a match against Hibernian on October 25, and a final league game against Dundee United on October 28. How O'Neill navigates these challenges will be decisive. In summary, the question facing Celtic is not merely whether O'Neill should remain, but whether the club’s broader structure—board decisions, transfer strategy, and squad harmony—can adapt to a more competitive Scottish landscape.

The next few weeks will be pivotal. If O'Neill can harness his experience, integrate the new signings effectively, and restore confidence, Celtic may yet secure another trophy haul and preserve his esteemed reputation. Conversely, if the underlying problems persist, the club could endure a barren season that reshapes the narrative around both the manager and the institution itself.