Specific to @yashima’s situation: show them Space Base. If you have folks complaining about luck in a game where skill is important, put an editable craps table in front of them.
I mean it. Tell them straight up: this is a gambling game. Show them the probabilities chart at the back of the manual, maybe even incorporate the quick start variant (everyone starts with 15 gold and has a selection of 3x lv.1 and 2x lv.2 ships they can potentially buy before the game begins) to avoid a crummy/boring start. Then, DESTROY them.
I can’t think of a better game to exemplify the divide. It’s a game that positively revels in its luck aspect, but gives you swathes of amazing choices to ensure luck finds you. I’ve played this game close to 50 times by now and the only times I can attribute a win or loss to luck is when one of us actively pursued the big long shots (usually me) and struck big.
My partner and I have a hot, long running rivalry bordering on feud at this point, something that just wouldn’t happen if we felt there wasn’t any agency in the proceedings. It’s also worth noting that I have a tendency to get pretty salty when I feel like a game is pushing against me to a degree that is disproportionate to the rest of the table. I’ve never once felt salty after a game of Space Base.
Anyway, just a thought. I feel like it’s a really good, experiential way to see skilled play emerge in the face of what is pretty obviously a luck-heavy game.
[EDIT] To add: mid-heavy Euros with top-decking absolutely murder my mood.