Depends...
Depends on where you draw the line for users with "just a small handful of posts".
It also depends on what you consider "shit on other devs work".
If you try out something it is up to you if you like to comment on that. Posting your own opinion or critics on a game should be welcomed as long as the comment is somewhat rational and not straight insulting or for example if the game is clearly tagged as NTR there is no sense in bashing it for NTR content. So for playing games with tags, you don't like and then raging about the content of the game I'm on your side, that's unnecessary.
Criticism on writing, render quality, animations, and other reasonable topics is good in general as long as - as already stated - the comments are based and written without insults and bashing the game or developer.
Here in this thread are examples of both reasonable and unreasonable comments.
Mostly the users are to be blamed for wrong expectations and resulting comments but devs also have a way to influence that. They should, when starting a project, take some time to explain their project and themselves. Stating if it is a single person's first-time hobby project or if it is a team effort of experienced developers done full-time is a big difference maker in the expectations of the players/readers, just as a small example. The more you go in detail describing your project the better off you are. Most devs lack in this regard and don't use an hour or so explaining themselves and their project, this alone avoids tons of negative backlash.
On the other hand: If your set premise of bad comments is to bring a game down wouldn't it be way more effective to write bad reviews and so directly affect the rating of the game?
