Patient Gamers

Rimworld and Skyrim.

Skyrim, same reason as everyone, I've finished most guilds though (yeah, not you, Companions).

Rimworld I just can't be arsed to work towards any of the endings, playing thematic colonies with mods is where it's at for me.

Skyrim for the same reasons.

Satisfactory 1200+ hours, and I usually end up rethinking my setup around the time I get to Aluminum production and never stay to finish things. I much prefer the beginning and middle of the game. I'm weird, though, I do the one big base thing.

Quake I have no way knowing how many hours I played LAN Quake after work with coworkers. Started with the alpha release. Eventually I did Quake World. I've sunk a lot of hours into the single player game, too, but not nearly as many.

Guild Wars 2. Granted it doesn't really have a "finish" but that doesn't stop be trying to complete more and more of it.

Probably Europa Universalis 4. I've played dozens of campaigns, and clocked in hundreds of hours (>850), and I have yet to make it more than 2/3 of the way through the campaign time. I usually have a specific win condition I'm interested in (e.g. an achievement, or cool scenario), and once I hit it, I don't bother continuing the campaign.

Other than that, I tend to bail on most RPGs around 50 hours in, so I've never finished any Elder Scrolls, Final Fantasy, etc despite starting numerous times. I feel like I bail when I get too powerful, need to grind because I'm not powerful enough, the story drags and I lose track of the main story line. I still keep starting them, but I almost never finish them.

Does EVE online count? 1k+ hours, only dipped my toes into null sec a few times. Mostly spent in low sec blowing up expensive things.

Another World. Since it was released I keep coming back to it. Next time I'll finish it!

Dota 2

Valheim. There is so much to do, explore and discover! I play VH either with friends or solo. We've never finished all bosses yet and are currently less active, but we often get very active in bursts of time. I can get lost for HOURS in this game, completely forgetting the time and world around me. Then I notice I've played for 6 hours straight and mostly gathered some wood and improved my house a bit. I never gets boring though.

Don't Starve. I've spend a lot of time in this game and I think I've not even seen a quarter of all the content. I've never even defeated a boss.

Magic The Gathering. From the original mtg (with Shandelaar), to manalink3, and forge. Not sure if the game can easily be 'finished' tho, but it sticks..

Rocket League, 3693(steam)+PSN(probably a couple hundreds) hours since 2015. It's multiplayer so you literally can't "finish" it.

So I must be really good at it right? RIGHT?

Ahem, you don't need to be "really good" to enjoy a game for a long time. ;)

I've been trying to beat XCom 2 for years but I always end up ragequitting when I lose three guys who miss multiple 90% shots in a row, while behind high cover.

I think most new games have a modified "perceived chance to hit" that makes an XCom 90 a 70 or something.