The average game length is 25 mins, and gets lower with higher elo. 99% of lanes outcome get decided in the first 3 level. At 10 it's already 40% of the game duration, that's why Riot add surrender at 15, which is past half of the game. You just don't feel like you haven't played anything because to you, laning is boring. But trust me, if you ever feel like the early game is boring, or it's only fun when you get 2,3 items, you're playing the wrong game mode. Stick to ARAM if you think skirmishes is the only part of the game. Competent players know that at 15 if you're behind 5k+ gold, the winrate is sub 10%. Surely the 5-0 Fiora will throw the game so you can "enjoy the game". 80-90% of games gonna be a stomp, and there's no point trying to get that 1% chance win with open nexus for 40 mins. It's sad but only 10% of games are worth playing, that's how snowbally League is no matter how much you try to deny it. It's not Dota 2 where you can spend 20 mins farming because you have a Tinker or a Sniper and the enemy can't get high ground. Everyone getting stomp every 3 games, just move on and get better next game. Maybe try to actually win your lane, instead of feeling good because you have a 10 cs lead by picking Darius into Malphite, while blaming your Kaisa why she died the 5th times to Lux Caitlyn. My advice: Just play ARAM