149.0 sluggish and stuttery on MacOS 26.4

Hey, does anybody else also have a slow and sluggish experience since upgrading to 149 with characters appearing delayed, srolling beeing low fps, sites not rednering, etc.?
I tried clearing cache and cookies, even downgraded to 148.0.2 and messed up my user profile (new one felt better). But no success. I have a couple of standard adons like ublock, sponsorblock,... But never had a problem. I can share full config if needed.
M4 Pro, 26.4, 149.0.0