i think you've been mislead somewhere along the line. the fediverse is not infallible-- no decentralised network is immune to any attack vectors. this has happened in the past with XMPP. google took a leaf from Microsoft's book and implemented the "Embrace, extend, and extinguish" strategy. some more details on that and specifically how it relates to the fediverse can be found at the link below.

https://ploum.net/2023-06-23-how-to-kill-decentralised-networks.html

but aside from XMPP and the fediverse, even major decentralised networks like email have succumbed to this. you would be surprised how infected email has become. small independent mail servers often struggle to even get mail into the inboxes of people on major domains like Google, Yahoo, Microsoft etc.. some more details on that can be seen from the link below, but this issue on an email level is far more expansive than just this.

http://www.igregious.com/2023/03/gmail-is-breaking-email.html

Meta is no stranger to anti-consumer practices and is definitely no stranger to devouring smaller projects in order to expand its' own influence and userbase. all for the purpose of squeezing every bit of data they can from its' userbase to sell to advertisers. i encourage you to learn some more about the weaknesses of decentralised networks, and about Meta's history of disgusting business practices.

i don't know why you joined the fediverse, but for me, this is directly against the ethos of what this platform is for.