What caused such a drastic shift from 2010s internet culture to 2020s internet culture?

I've noticed time passed so quickly and somewhere around 2020/2021 internet culture changed.

It became basically a corporate wasteland, everything is short form and algoritmic and everything is (innacurately) moderated by shitty AI.

I think COVID (which contributed to kids spending more time at home, therefore assisting the creation of brainrot), AI and tiktok ruined the internet.

Memes as we know them are not the same, I miss trollface and dank memes and now it's basically hawk tuah and brainrot TikTok videos that last 2 weeks. The last truly viral meme I remember was Amogus in 2021.

I also think PewDiePie's loss contributed to the corporization of youtube and yt proritizing companies. But not only that.

There is so much censorship. What do you guys think contributed to sooo much monetization and censorship? Besides AI?