Tahoe to me is stable, the Liquid Glass doesn't get in your way either. It's pretty elegant. My machine is still insanely fast.

The other day I saw an article about not being able to resize. I can't reproduce that either, it's easy to resize windows in the corner.

I have no reason to expect things won’t evolve to fix some of the quirks of the design, especially with the new design lead who has been with the company for decades. The guy behind Liquid Glass is at Meta now.

Downgrading and leaving the platform feels like an overreaction.

System Settings > Accessibility > Display > Reduce transparency should be on.

System Settings > Appearance > Windows > Sidebar icon size should be Medium/Small.