[d--b]

It's a way of expressing things. "I don't get why you do X" generally comes across as "it's not smart to do X".

Similarly, "this kind of projects" sounds derogatory, as you don't specify what kind you're talking about, which implies "the kind of projects where the author didn't think things through thoroughly".

Also "AND", why do you need to capitalize here? Cause you want to show that your idea is a much better one.

I think you know pretty well that you were criticizing the project in a way that was not very friendly, as in: if an actual friend of yours had made the project, you wouldn't have used the same wording.