You can say the truth of the matter without being brutal. You are trying to tear down someone that contributes to open source, and whether or you not like it, people out there do or they wouldn't still be developing it.
And contrary to what you seem to think, if you don't like the product don't use it, and better yet don't comment on it as you aren't helping anyone.
And contrary to what you seem to think, if you don't like the product don't use it, and better yet don't comment on it as you aren't helping anyone.