I've seen a lot of grace extended towards cohost staff, and not a lot towards cohost users.

The cohost devs chose to build their team small and worker owned, in a way where moving quickly is impossible and it's difficult to grow. There are pros and cons to this.

Expressing frustration at a lack of perceivable progress and communication is a reasonable reaction to the state of the site. Quitting cohost is a reasonable reaction as well. Everyone gets to make their own decision if they want to be here or not.

You don't need to tell someone they are wrong or mistaken for requesting accessibility features, you can just assume they (like the cohost devs) have good information guiding their actions and move on.