I think I could genuinely create an entire list of games I've played that I'd consider completely atrocious or awful to play, so here's a few of them explained in very brief detail. Please note, THIS IS ALL JUST MY OPINION AND MY OPINIONS SUCK!!! Hopefully I'm not too negative with this lol sorry.
The Horde: A really weird medieval themed game starring Kirk Cameron (I'm not kidding). You play this weird Farmville-esque portion of the game where you do... something. Then suddenly the horde appears, in which you run around slashing them to death. The main issue with the game is with how it plays, primarily being mouse only. I was very ashamed to see the game be this bad considering the other game the devs made, Star Control 2, is one of my favorite games ever made and is a genuine masterpiece of gaming.
Deponia: This one is actually a hot take! Very annoying protagonist, moon logic galore, just not a fun game. I could honestly put any point-n-click here (sorry, I don't like them), but this one made me more upset than usual because I thought it would actually be a good game lol. I clocked in an hour on it and decided I was done. Thankfully, I got the game for free, so...
The Wardrobe: Same exact reasons as Deponia. The game also relies too heavily on referencing pop culture and the art direction to the game is genuinely atrocious. Didn't like it lol.
Sonic Forces: I don't think I need to go into detail about this.
FlingSmash: Wii game with forced motion controls that aren't fun to play with. It can be fun at times, but vigorously swinging your controller like you're swatting flies is not fun to me lol.
Disney Infinity Toy Box Challenge: I thought it was going to be a port of Disney Infinity to 3DS and was extremely hyped to play it. Turns out it's a party game, and a really not fun one that that. I dislike it because it disappointed me.
Any Roblox game: They're just not fun...
Fortnite: I have the strongest love/hate relationship with this game, but I do consider it one of the worst I've ever played due to the embarrassing amount of money I've spent on it lol. The game will flip-flop between being extremely fun to play, to being one of the worst things you'll ever experience depending on how the developers felt that season lol. Currently I'd say the game is actually kinda fun??? Also I'm not very good at it so...
MySims Skyheroes: It's the only game I ever decided to actually throw away in a trash can.
Wild Animal Sports Day: Janky controls and really unfun minigames that I believe were not playtested at all. Unlike Wild Animal Racing where you can get some sort of enjoyment from the jankines, this game is actually unplayable in comparison lol. Don't play it.
2002 Games Launcher: A collection of stolen Flash games put onto a CD-ROM. They're all awful.
And that's about all because my mind blanked lol. Again, sorry if I was too negative, but these are just a FEW bad games I've had bad experiences with.