Is this a red flag?

One thing that I've always known to be a red flag is when guys get mad at girls for being "basic". Like drinking pumpkin spice or liking Taylor Swift. Having Uggs. Any guy I've ever met that has complained about "basic bitches" always ended up being misogynistic. I'm 22 and I'm dating a guy who's 21. He still lives at home for college. IDK if you guys know what Stanley packing videos are but it's people who pack their Stanley cups with like lotion and mini backpack and stuff. I don't really get it but they are not hurting anyone. When I was there my boyfriend was scrolling through tiktok and one of those videos popped up and he said "I fucking hate people on tiktok!" I asked what was wrong and he said one of his tiktok pet peeves are people who pack Stanleys and to just get a fucking purse. Even his mom said they are not hurting anyone. My boyfriend just laughed and said "IT'S HURTING ME! I HAVE IT!" His mom just laughed and called him a gobber. I know this isn't the same as hating girls for being "basic" but is it a red flag.