Red flag or no red flag

I’ve (33f) been chatting to a guy (43) for a month or so. We’ve gone on a couple of dates and he seems nice enough, but I’ve noticed he ‘doesn’t get along’ with quite a few people in his life. His dad, brother-in-law, sister. All fine, since family can be tricky, but also his ex girlfriends children that was under 10years. Fast track to tonight he said his sister visited over the weekend, and then continued to say that they don’t get along and she irritates him because ‘she is the mommy-type housewife’ that is ‘over emotional’ and ‘over reacts’. Bearing in mind she lost a child a couple of years ago, so being an ‘over emotional mommy-type’ kinda makes sense because trauma. Something about this just gave me a bad a taste in my mouth. Am I the one over-reacting now by feeling like this is probably a bit of a red flag? His choice of words just didn’t sit right with me. He also claims to not have male friends as they are weird to have him, a single guy, around their wives.