I am not a counter strike player so my knowledge on the subject is a bit shakey but from what I understand there were a lot of issues with the game on release (which isn't anything new when it comes to video games). The main issue is that in order to avoid crashing the csgo economy, they transferred everybody's items and pulled the plug on csgo's matchmaking. You can still play it of course, but without matchmaking the game is essentially dead.

The reason I don't want a TF3 is because

1. I don't trust modern valve's judgement when it comes to game design anymore, especially when the rest of the class based shooter market is setting a bad example. IMO TF2 is vastly superior to games like Overwatch 2, Paladins, Valorant, and Marvel Rivals. I don't want TF3 to make too many changes for the worst
2. I am no programming expert but I would imagine that many of the bugs and quirks of the source engine that help make the movement in TF2 as great as it is would cease to exist in TF3.
3. TF3 would almost certainly mean Valve pulling the plug on TF2, and given 1 and 2, there is a significant chance that one of the remaining enjoyable shooter games would be replaced by slop. TF2 is basically the only remaining casual first person shooter on the market to be honest.

That is my opinion, maybe I am an out of touch boomer. Chances are that Valve does nothing so I'm not too woried.