Xenoblade Chronicles.
My friends got me the Limited Edition (red classic controler) for my birthday in 2011. I tried the game. Absolutely hated it. But since it was a gift, I tried to force myself to beat it. Reched the Mines on Colony 6 and ended up putting it down.
I tried to play it again from scratch months later. Same story. Couldn't get past the Mines and stopped playing. I felt like the game was absolute trash, with a confusing battle system and I got lost frequently. At the time, I wasn't used to playing games with big worlds.
But one day, I decided to give it one more try. Only this time I would... You know, actually learn how to play? I started paying more attention to the tutorials and I read the instructions manual (btw, the thing was HUGE).
And then everything finally clicked. My problem was that I was so overwhelmed by such a different game compared to the other things I used to play, that I had trouble getting used to it... And I started to hate it. And in return, I didn't care to learn how to play. Silly me...
After that, I had an absolute blast with the game and it became one of my favourites of all time. Beat it on Wii, then on the New 3DS, then on the Wii U VC and then one more time on Switch (DE). And I'm sure I'll eventually do it again. What a marvelous game and how stupid I was back in 2011 xD