I am not so sure calling Peter Thiel a nazi is productive. Maybe i am ignorant but i havent seen anything that indicates that he is a nazi.
Ultimately, Peter Thiel and Tencent funding reddit didnt affect reddit's content in any way. These groups own a very small percentage of the site and neither of them administrates the site.
I am not familiar with lemmy but it seems that the administrators are tankies and popular posts are supporting tankie ideology. That creates a specific vibe that attracts specific people, i am not one of them.
It's like voat. I dont know what voat admins thought but when i went to voat, i saw nazi/white supremacist posts on the frontpage, so i wanted to leave as fast as possible. Btw i dont subscribe to the school of thought that tankies are as bad as nazis but i do think tankies are bad.
Ultimately, it's a vibe check. Something which reddit has been failing for 10+ years. I was on reddit for 14+ years and i saw it changing a lot during those years. I have been wanting to leave reddit for years but there was no good alternative and this api change just gave me the last push that i needed.