The guidelines are pretty clear that basically all of this comment is not ok, and that this kind of comment is net negative for the quality of the site.

> Be kind. Don't be snarky.

> Edit out swipes.

> When disagreeing, please reply to the argument instead of calling names.

> Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith.

It seems pretty clear that saying most TUI projects are show-off projects does not mean all TUI projects are show-off projects.