Let's see the negative changes to websites that have happened in 2020:
Turning off comments sections of videos "made for kids" and then for auto-generated topic channels. More censorship in terms of comment visibility. More false positive videos getting removed. Videos filled with more ads than before and many don't see any money for it. Also became harder to navigate due to search showing fewer videos per page.
Twitch: More PC bullshit. More DMCA when it comes to audio with many important clips being lost.
Pornhub: Removing millions of videos, removing ability to download the videos.
Facebook: More censorship as usual.
Twitter: Adding ability to limit replies to your tweets, creating even more echo chambers. Also, more rules and ways to get banned.
Pastebin: Removing pastes using automated methods, having major false positive issue.
Patreon: More restrictions what is allowed on site.
Deviantart: Eclipse website design was made mandatory. The site became much harder to navigate.
Reddit: More subreddit bans, mods being more banhappy than ever before. More ads.
There are probably many websites that I have missed.
If this decline accelerates, imagine how bad 2021 will be.