I don't know if he has an alcohol problem, but he certainly isn't a very nice person. Alcohol could exacerbate his strong personality, but no one deserves to be looked down upon or told that they aren't sophisticated enough to enjoy a good wine or whatever.
I think you are smart to see these red flags and be concerned about them. You have only been on seven dates with him and these things are already coming out. I would definitely take a step back and consider if this guy is really what you want.