Honestly shorter games aren't that bad but...
They don't seem to be completing now, at least outside of ranked. It's always one team completely and utterly destroying the other team and a surrender at 20. I've never seen as many 5-0 surrender votes as I have recently. I can barely complete 2 items before a surrender happens.
There's just no fun in itemization, powerspikes, scaling runes, getting fed etc because none of that matters now. Whoever picks the best early game champions combined with a good team composition determines the win 10 mins into the game. Being destroyed 0-20 or destroying the enemy 20-0 and surrendering the second it becomes available is just not fun, at least not for me.
Please look into un-nerfing turrets and adjusting the power of certain items and champions.
doesn't even have a bad early game but his lategame is just unstoppable.
and
are impossible to poke out of lane and almost impossible to duel early on. From then on they just get more and more stacked and overpowered.
tl;dr revert the changes that made early game so ridiculous. Give teams a chance to make a comeback.