Oh OP I know exactly who you're talking about and can assure you that European ski resorts do too - there's a certain reputation that comes with/from these people. They're usually (not always) English and they're renowned. They have a reputation for more money than ability on skis. There are some resorts that are worse for this sort of thing than others, because it's not enough to say you're going skiing (for this crowd) you have to say the name of the resort too. They're known for being louder than necessary too - in part because they don't fit the stereotype of "reserved Brit" that many have of us.
The resorts in summer are often very different because that crowd are off to second homes/beach holidays (in similarly worthy places). The mountains aren't at all attractive then because everybody who's anybody simply isn't there.
There are also what I'd call hardcore skiers. They are experienced, skilled and are there because they love the actual sport, rather than the socialising (so ski resorts don't usually make as much money from them). They are on black pistes or off-piste, they're often not in the fanciest ski attire, not there for apres aki, get up early every morning to be the entire day on the snow and come back at last lift. They're very fit. Think of them like the experienced hikers of downhill ski. My DH is one of these. He's also not British. Used the same ski gear for 20 years (stupid in my opinion as it improved incredibly in that time).
People like my DH can be (and are) are a social group in the same way the loud Brits are (these Brits are known for being loud btw), but they're much more quiet. They're also tired at the end of the day, so less energy to spend on being loud. Aren't out drinking in the evening because they got to bed early to be in best form the following day.
The issue really with the people you're talking about is that they tend to have a sense of entitlement + need to be seen, so they enter a restaurant and fill the space. Everybody has to know they're there (because they're wonderful, so why wouldn't everybody?). Often a fair amount of performance parenting too. It's hugely irritating for people who just want to talk to their own table in peace.
Btw there are similar groups from other countries/cultures too who beat these groups of Brits in showing off, but they tend to keep their voices at a more normal level in the restaurants (likely different once a few drinks have been had though). They can be less superficially friendly too.
The people you'll like, OP, are the cross country skiers. They're basically the hikers of ski. And it's a cheaper sport (because it's only sports brands that make the gear, not fashion brands and it's not cool) so there are absolutely no show off point to be gained from going on that sort of holiday! Usually the resorts with good cross country skiing are completely different locations too. Interesting social groups in there too.
I love watching people. We all gather towards people like us in some way (there are some very judgemental, socially exclusive hikers for example) and the only thing I'm really criticising about the group you're referring to is the volume/space filling because it's irritating for others!
Enjoy the snow!