CLS is probably from ads, even Google's own "responsive" Adsense ads will nuke your score there. Both the text compression and JS issues are again related to a

CLS is probably from ads, even Google's own "responsive" Adsense ads will nuke your score there. Both the text compression and JS issues are again related to ads, since in many cases the page loads, makes a request with user info, goes to an auction then returns the ad to be shown-- and with multiple ads on the page, this ends up impacting both FCP and LCP. If they removed all ads, they would probably be at an 80+ performance score?