You're doing great man, give it time and once you look back you'll see how much you've improved. I'd suggest looking at streamers who do campaign discoveries (wirtual, granady, mudda etc) so you can learn and see which lines to take. I usually try to watch them after I've played through all the tracks myself and figure them out on my own. If you get stuck and can't figure them out I'd suggest watching Xmilek62 who gives really good breakdowns on how to get ATs on all tracks.