I'm 34 years old and I still can't decide if ill-tempered people are more or less inclined to tell the truth than other people.
I'm not skilled to say if the technical issues he mentions are valid or not but he basically said on every phrase a word like 'shit', 'crap', 'diarrhea', 'idiots', 'fuck', etc. This is rude and dismissive and this kind of language and attitude should literally be flushed down the toilet.
He may have a point but that's for the developers to be professional, ignore the rudeness and consider that later. And meanwhile this thread should be deleted - it's simply giving him attention that he wants but clearly does not deserve.