around 95% of feedback is positive to very positive.
Don't focus on the ones that don't like you. Focus on the ones that do. Unless there is something constructive in the negative reviews, you can safely ignore them.
Google doesn't have any reason to think you care about competition based on your query. You asked for a specific bit of information and it showed you websites with that information.
It's because of corporate greed. Anticheat is basically totally achievable on the server side, but that requires much more computing power. The idea of client side anticheat is to reduce infrastructure cost.
Few years ago the output of GPT was complete gibberish
That's not really true. Older GPTs were already really good. Did you ever see SubredditSimulator? I'm pretty sure that first came around like 10 years ago.
The whole point of the fediverse is that it's distributed. There's gonna be bigots. But they can be blocked, their instances can ban them, and then they can make their own instances which other instances can then defederate. That's working as designed. In a perfect world, the bigoted instances will be a disconnected graph from the network of other instances.
Marketing. It popped up for you and has marketing taglines suggesting it's substantially cheaper than other options. Some people are willing to jump through a lot of hoops for the possibility of savings
Y though