i know very well how it used to be, in fact i quite liked how it used to be. granted there was a time where it was out of hand and your typical game could very easily go 40+ minutes (even some 90 min games in there from time to time). however, usually games were over naturally between 25-40 minutes, which honestly is the optimal time frame. i miss being able to turtle in base or under my lane turret until i had enough gold to get the items i needed to actually do something, which happened frequently. thats the thing that youre missing. early game ends still happened, people still could win at 20 minutes and sometimes if it was enough of a stop they could even win at 15, but now riot has designed it so that comebacks are incredibly rare, playing defensive means delaying losing the game a little longer, and i actually go into games expecting them to be over in 20-25 minutes. also late game was not sped up, just what is now perceived as late game. i still dont usually get my full build until 35+ minutes, in fact riot even has taken to balancing late game champions around the new time frame so the game can stay sped up but late game champions arent completely unviable. i think its actually healthy for a team thats losing terribly to have the ability to come back and win. where it stands now its extremely rare for a team that got stomped early to come back in anything but a throw, but before if you played smart enough an early disadvantage wasnt even that enormous of a big deal unless it was a big gap. i feel like youre of the opinion that every game should be as simple as if one team is winning they should be able to hurry and win, and in some games i would agree that they should be like that but league is definitely not one of them. imo the biggest offender is rift herald. if you ask me they should either remove it or make it extremely hard to kill because right now its easy to kill and extremely powerful to have. its really not healthy, there wasnt any need for it. quite honestly if they took it out along with the turret interaction on the ziggs w and tristana e i think i would be satisfied tbh.
ps: 5 minutes extra of VOLUNTARILY continuing a game by not surrendering is very much preferable to 15 minutes of feeling like i wasted my time because theyve been in my base in 2 lanes since 9 minutes (i frequently find one team in the others base before 10 minutes).