You are totally entitled to that opinion, it's how that opinion was disseminated that I found issue with. Just look at what you wrote; "complete waste". That's highly insulting. You can say you don't like the changes, but who are you to decide whether someone's contribution to a computer game is a waste or not? Especially as you have absolutely no visibility of what was done and for what reason.
It's this sort of knee jerk reaction from people who have done nothing more than pay £20 (or $ or € or whatever) who somehow seem to think that gives them carte blanche to ridicule the time spent developing a game that a lot of people actually like and find the *autistic_screeching* is way over the top.
Criticism, sure, but it must be constructive. I wrote a post about this before but salty children whined and gave me negative rep which just shows that there is a minority of people in the community who don't care about the game so long as it fits their exact template. Any deviation from that template is somehow akin to the world ending.
Let's just look at the other points you made.
"AI is terrible". No mention that they are a significant improvement since A16. I would also suggest that you have never written any AI routines. It's actually very hard for all sorts of reasons, and that's before you then need to rip most of it out in order to support the number of AI. You either get few, very clever, zombies or lots more who are much less "clever".
"Skill system is horrible". Said it before, it's not changing in A17 (it might be in A18, who knows) so to continue complaining about this is pointless. It is the one point I have sympathy with, but again it's the explicit disregard for any positive.
"Vehicles and why so many". Go back, read up on the A16 comments, you'll see there was a lot of positivity regarding new vehicles in A17. There was lots of positive feedback on the YT videos showing the bike, the jeep or the motorcycle. Why have so many? Hell why have so many guns, why have so many different things to eat. At this point it seems you are complaining that TFP have added stuff to the game. Edit: See the one thing that disappoints me with vehicles is a lack of a boat. We've all got stuck on the other side of water where RWG seems to have generated a crossing miles away.
"Temp buffs are worthless". If you fail to use them as an advantage then that's your issue, not the game's. They are certainly not OP and provide a short term benefit. For example, about to loot Shotgun Messiah, why not use a looting buff. About to take on a PoI with ferals, why not use a melee buff.
As for the new PoI's being "the single worst addition in 7 days history" that actually had me laughing out loud. You are in such a tiny minority with that it's not even worth discussing.