Games that take ~40 minutes to end are already lost 99 % of the time
I feel that games are decided by 10-15 minutes. Usually end by 20-25 minutes. There are exceptions the "long" games which are just the team trolling by refusing to surrender and/or the enemy team refusing to end just to mock us.
The mentality that every game is winnable is very infuriating and time wasting. In over my ~5000 games maybe 1 % or even less were comeback games.
When every lane is lost, the enemy have 4 turret, 3-4 drake and 15 -20 kill advantage over your team. Despite all of these facts people still refuse to give up.
If my team refuses to give up and move on to a different game to actually have a decent chance of winning and having fun. I consider them toxic trolls who deserve to be reported. Most of the time players who go 0 10 0 in 15 minutes are the 1s refusing to surrender.
These are the type of games any sane person would want to leave, but will get punished for it instead of the troll who is ruining games and wasting peoples times.
If things go so bad that they want to leave the game there clearly is something wrong. If the leaver is a feeder then its for the best. If the leaver is the only 1 with positive KDA in the team , it is understandable that they dont want to waste time with bad players.
The game feels awful as it is by forcefully giving me bad teammates to carry in ranked or getting destroyed by master tier players vs my bronze teammates in normals. There is no need to waste time waiting for unwinnable games to end.
My experience in season 7: There were only ~10 games where my team were good enough to carry me. The rest of the ~500 games I played were me or my premade carrying. If I lost lane or went even then the enemy botlane alone dominated the rest of the game. There is no counterplay against a fed adc who is healed/shielded by a fed support.
My idea how to change the system:
Just remove the afk punishment after 20 minutes. LP loss is an LP loss no matter what or if its a normal game then who cares. If everyone can leave without punishment then its fair. The winning team will get their reward either way.
Edit: Oh well it seems the never give up feeders are the majority even here.