I've never set foot in Ibrox as a matter of principle. I've been to Parkhead a few times but usually when it's been being used as a neutral venue - only once for a game against Celtic. So my experience of Glasgow is pretty uncoloured by experiences of those places.
I did live there for a while and am a pretty regular visitor and I wouldn't be if there were not things about it I like, but it definitely feels a "different planet" culturally in a way that places like London, Bristol, Manchester, Leeds, or Edinburgh don't and sectarianism is a massive part of that. I don't doubt it's even more obvious in some of the smaller towns but I'd have no reason to go there.