Some players on low-spec machines mentioned a performance drop after the last update. I have already done some tweaks that should significantly improve FPS, but the version is not ready for a full release yet.
I have opened a new "pre-release" branch that currently has a lower spec version of the game for those who need it. To play it:
Right click Bush 1022 in your library
Select Properties
Go to Game Versions and Betas
Pick pre-release
Thank you!