Saying things like "I don't like this software because <concrete reason>" is reasonable; it can be considered constructive criticism, especially if you include a way it could be done better. Heck, even just "I think it's too complicated to use, and the underlying code base needed to support that complexity lends itself to bugs that can be exploited" would be better.

Saying things like "No amount of money is going to impart good taste and best practices onto these projects" is insulting the people who wrote it with no real basis. It's not helpful and it makes you (and some other people in the thread) sound like a jerk.