If you lead with “Thing you like is actually bad”, their immediate response will be to disagree with you and start defending the thing they like. And if you want someone to listen to your arguments, rather than just try to poke holes in them, you must avoid putting them on the defensive.
To get through to people, find common ground and build off that. “If you like FEATURE in GAME, you’ll probably love SIMILAR FEATURE in OTHER GAME because…” is something that’s actually going to get someone interested, rather than start a pointless argument