Are you reading my mind O.o I've literally thought about most of that. Same here, talented in a lot of things but lazy as fuck. Contemplated whether I have ADHD cause I've realised that even my process of thought is different than 99.9% of people. Get bored easy like you and disinterested with things that don't excite me.
That said I guess I've just decided to get on with it, realised sulking wouldn't do anything. I feel ya bro and don't get depressed over that, you can't control the past so just make sure you make the best of what you have right now.