The Blackwell Epiphany
Not every story needs to be epic. Up until Convergence the series was surprisingly low key, considering the subject matter, and felt like one of those comfy 90s TV shows. For some reason Epiphany just had to raise the stakes and in the process drove that charme completely off a cliff. The game is actually still great and it's not even badly written, but it completely kills the tone and could have been much more imo.

Divinity: Original Sin
This one is frustrating, because it could have been good. It should have been good. It starts of so well: no "you're teh chosen one, go save the universe!" snooze story, interesting combat with lots of options, and a sassy AI partner who spices things up by bringing his/her own opinions to the table.
Two hours later you're back to the same cliched story you've already seen in countless games before, the combat turned to a series of critical dicerolls and reloads, and your NPC partner tries to disrupt your plans at every turn with no regards for something like a consistently written character.
So many things to love, so much potential, but the game insists on pissing it away.

Starbound
I'm not entirely sure why you'd have your game in early access since the invention of the toaster, just to spring some seriously controversial changes at the last minute and ignore community feedback on it entirely, but here we go. The standouts are a toolbar with worse functionality than what we had during the entirety of early access and that was received less than ethusiastically, and a forced storyline that makes Divinity OS look like Dostoevsky.

Neverwinter
Neverwinter is an MMO that went into open beta as a roughly average game and somehow managed to get worse with every update. Not every major content update, but every single update, patch and hotfix. It's almost beautiful in a perverted way. Highlights included more P2W than you could shake a stick at, tons of balance fuck ups, nerfs to their in-game quest editor, because people leveled too fast, and the only fixed bug being level geometry, which in turn prevented parkouring the maps - because how dare you have fun!

Fallout 2
Fallout was an interesting post-apocalyptic world with its own style and subtle humor, that painted a homogenic and depressing post-war future, in which settlements form around necessities and people try to re-establish some kind of civilization again along primitive caravan routes in the face of scarcity, largely absent of modern technology.
Fallout 2 somehow had communities regress centuries, if not millenia, in the span of a few decades, while their neighbours a few miles down the road, ignoring the whole scarcity theme, decided the first thing they wanted from their never explained abundance of ressources and electricity was casinos, drugs and porn movies, as you, the walking chosen one trope, hang around with the robodog from Doctor Who, literally Skynet, and Fred, the talking Deathclaw.

And of course all of the abandoned games with no updates in sight, shitty ports that are borderline broken, telemetry-ridden games and every single Idle-/Mobile-/P2W-game that doesn't even bother with gameplay, but instead preys on psychological weaknesses/tendencies of their playerbase without as much as a shred of human decency, let alone artistic vision.