You are a horrible person and should delete your games as penance. It is all your faul! Disheartening new developers by your mean and unasked for "opinions" wrapped around your destructive comments. Seriously, what were you thinking? Voicing your so called opinion on a public comment section where the owner of that account would have full control and could delete your comment and ban you.

No wonder you were banned from those games. Oh, wait. That's not what happened and I am just exaggarating for comical effect and to illustrate a point (mostly that you probably did not make any such barbed destroyer comment, no matter how "negative" you think your comment was.)

Joking aside, there are many explanations. But some are indeed, that your "negative" comments were taken to heart and consequentially the project was removed. Maybe the devs were younger children, not ready to face the internet. But that you managed to do that twice with different accounts makes this rather unlikely.

If this was jam related, maybe it had jam reasons. Many such games are specifically made for the jam. Also, the deletion of the games could be totally unrelated to your comments. It could even be, that someone wanted to delete the project, forgot about it, and was reminded that it exists by your comment.

I did see people remove their projects, but this was not because of negative comments. Not directly. It was unfinished or low effort projects. What usually happens is, that the bad comment gets purged, or even the comment section closed. But that takes more than one comment. And some people re-do their project for one reason or another. That can include bad ratings or comments. So instead of updating it, they delete it to publish it later again.

What also happens, accounts get hacked and stuff is published on them. Sometimes those fake games get comments.

But yeah, would be interesting if there really are developers out their losing motivation after a single "bad" comment. 80% of the games here are utter crap. By standards of gaming. But by standards of amateur games most of them do have their merit. There is still some really bad stuff among this of course. But people uploading this usually know about the quality of their work.

I took a look at your comment history and I don't see anything that would reasonably offend a developer. Most of your comments are just pointing out errors that the average dev would be happy to know about so they can fix them. Either the devs who deleted their games need thicker skin, or the deletions are unrelated to your comments