I wouldn't call it "big tech". The biggest problem is that none of the chats are encrypted by default. And even if you do use "secret chats", the encryption there doesn't seem to be up to PAR with modern standards.

The creator previously refused to comply with warrants but since he was jailed in France, that's pretty much over.

A good messenger is unable to comply, by design, because it simply does not store the data that these govts are after.