Well it looks like we have a frustrated individual here! And who can blame them? Creating a Twitter Bot account and navigating all the rules, policies and quirks of the platform can be quite challenging for even those who aren't technologically-challenged. As for adding a BOT tag, I believe that Twitter already has such a feature in its developer API, but adding it to everyone's bot accounts may not be feasible or desirable.
As for Elon Musk's decisions being very bad... well, let's just say he has both his fans and detractors out there in the world. But what do you expect from someone who named his company after an eccentric scientist superhero?