u/OrbitalColony

Every other Captain had either peer-level or vastly superior technology 99% of the time (Picard / Janeway). Archer fought a goddamn war by himself, halfway across the quadrant, in a practical bireme. Bro got his ass kicked non-stop, and still pulled through.

Every other captain was operating with a well defined set of moral and legal standards, even if they sometimes ignored them (Kirk), or if it was purely philosophical most of the time (Picard). Archer had to agonize over everything, and still act quickly enough to achieve Humanity's existential objectives. If he made the wrong call, then Earth was going to face gunboat diplomacy from some pissed off aliens, with no way to defend itself.

Every other captain had help (Sisko), even Janeway would have been screwed without giga-chad Barkley co-opting Starfleet's resources. Archer didn't get shit from the Vulcans, unless it gave them Intel or influence (limited star charts, for an onboard spy as first officer); and the Andorians were purely transactional or outright hostile when it suited them. He had to found the goddamn Federation himself in order to have friends.