Ooohhh, I've got a few but I'm gonna focus on one. Payday 2 and by extension the entire series. To put it mildly, the game has a lot of systems under the hood. For one, the shotguns don't work like how they work in other games. In most games, when you shoot a shotgun multiple pellets come out, and they each to a set amount of damage, lets say 25. If one pellet hits, it does 25 points of damage, if two hit it does 50 and so on. You want to increase accuracy on your shotgun to insure more pellets hit your target and do more damage. Not in Payday 2, it technically DOES have per pellet damage, but if a single pellet hits an enemy, it does max damage. It doesn't matter if 12 hit them or 2, you are only doing 50 damage to an enemy. What you want to do instead is decrease your accuracy as much as possible so you can hit as many enemies as possible with a single shot.
The game can also be shockingly slow. You have regenerating armor like in Halo, but if you are being shot at, your armor is not regening. This is a system called "supression" and it is very annoying, it was fine when the game was a slower paced game from 2013-2015 but after that the pace of the game increased heavily so you have to be constantly taking out enemies and knowing how to prioritize what enemies to shoot.
This is really only the tip of the iceberg with Payday 2's gameplay, I reccomend watching this video to know more. It's very deep, and the game doesn't tell you about any of this. It just straight up lies to you at points, actually.
Also, I'm seconding the visual novels and dating sims being misunderstood. shits really annoying, there's so many interesting stories going on in those genres and they constantly get labled as "date everything xD!!"