While I disagree entirely with the opinion Ambrosie is singlehandedly at fault for all that's gone wrong since the pandemic began, that his "leadership" is bad, or that he's some scarf-sporting bogeyman, he is the commissioner of the CFL. To that end, he's effectively the "face" of the league* from the standpoint of its business operations. The same way he wears its successes, he's the one who wears its failures, even if neither are his solely his to bear.
I think the issue that rubs many fans the wrong way has less to do with the current commissioner and more to do with how the CFL operates as an organization. Despite being a professional sports league, finances are often shrouded in secrecy and we're left to speculate on player contracts, team's SMS figures, profits and losses, etc. This culture has been around decades when it comes to the league's overall operational landscape, so it's not unreasonable as a fan to be put off by this. More openness wouldn't be a bad thing, IMO.
We're all fans of the CFL and want there to be a 2021 season. 2020 sucked enough as it is without a CFL season, especially because our team couldn't defend its title, as well as the whole Atlantic expansion being shelved. Another lost season would be disastrous, so I hope whatever is taking place behind the scenes is progressing well.
* it's no different when fans **** on Bettman or Goodell.