Isn't that rather old news? I remember reading articles like that years ago.

I think in this case the data might not be all that insightful though because they chose so many games that only just came out. It doesn't necessarily speak of players abandoning their games. Some of them could just be chipping away at them slowly, because with work and family and other RL stuff, they only have few hours for gaming in between. Others might have bought the game because they saw a good deal on it, but then did not really start to play it yet (maybe just tested whether it works).

And the reason why DLCs are selling is probably that many customers are afraid to miss out on good stuff and prefer to buy the "full" package before even trying the game? Also because a lot of DLCs tie into the main game campaigns rather than being playable after it, so if you discover you like the game enough to finish it and then buy the DLC, you might have to start from scratch again in order to benefit from its content. Completionists, collectors and OCD contribute to DLCs being profitable, I'd guess. The article asks why developers even care to offer DLCs, but they probably do so because publishers ask them to. For them it doesn't really matter if you play the DLCs as long as you pay for them.

Don't worry about it at all, and don't be hard on yourself. Set a goal to finish the game if you like it. Practice makes perfect and to be a master, it takes 10thousand hours, And that's ridiculous for a video game. Who cares if you're terrible at a game, not like everyone's watching you. Morrowind is a good game with mods added, and Oblivion is good. Take time with games, no one's judging.