You're not snotty, it's hard to enjoy very crowded places. Florence is probably the place I've enjoyed visiting less on this planet for this reason. It's too small for the number of people.
Also, you really don't get to see any real city, it's a theme park, same for Venice. Locals are hard to come by/see.
I feel lucky as an Italian/European to be able to visit the less known places with ease, having the time and being in proximity is great.
But often I read tourists on reddit asking for those tours of Rome/Florence/Venice over 7/8 days and I struggle to imagine how they can really enjoy such a tour de force in very overcrowded places..