Many complaints are due to balance, classic “features” or similar. Just take a second to look through this forum.
And those two are just from the first few seconds I spent browsing.
People are complaining about missing QoL features that weren’t in classic, they’re complaining about missing balance, which they knew (or should’ve known) about and so on.
Yes, the bugs, exploits and similar indeed diminish ones personal enjoyment, but I don’t think people are referring to those players complaining about bugs and exploits, but rather to those that are complaining about classic being classic.