I doubt the internet drama has any real effect on the market share. It’s that chrome and safari work really well so there is no reason for the average user to go out of their way to install Firefox.
Mozilla's lameness is really the result of privilege and possibly a lack of incentives. When execs get 10m/yr for writing blogs about sexual socialism and BLM, why innovate?
Why would FF be going our of your way, but not Chrome? Neither is the default on Windows.
And Firefox UI is going through a redesign (Proton).
https://winaero.com/enable-the-new-proton-design-in-firefox/