Unpopular Opinion: Damage Creep Isn't That Bad
I believe that the amount of damage in game allows champions to do exactly what they were intended to do, which is eliminate threats as a team with a coordinated spell rotation and then push objectives to victory.
Previously in league, the amount of sustain that many champions could build made for an unhealthy and severely boring game. Most jungle were building cinderhulk and a garen could go full tank and take damage from a focused team effort for almost 10 seconds, take out an enemy carry, and run away only to return to full health in mere seconds just to repeat the process. And those are just a couple of examples of what happens when there isn't enough damage or there is too much sustain.
I read posts about how this champion or that champion one shot some tank.
I call shenanigans on that.
Even in the current meta, a correctly built tank can survive 3 or more seconds of a focused attack. This survival is not intended for a tank to run away if they end up in the wrong spot at the wrong time. You get caught out, it doesn't matter what you play, you deserve what happens next regardless of what champion you play.
A tank's job is to initiate combat and survive the team fight just long enough for their allies to burst the enemies down so that their allies do not die in every engagement. It isn't run around the map blindly and spam emotes because, 'lol, I can never die'.
As for assassins, their job is to take out priority targets with as little effort as possible. Delayed damage proved too delayed so more damage was added in so that assassins could kill squishy carries without having the power to insta burst down tanks.
ADC's have a vital role in which they are supposed to melt structures like butter and secure the W for their team. The added benefit is that so long as they have a cooperative team, they can also turn around and use the damage to eliminate enemy champions from a safe distance.
And in before 'Supports, Supports have TOO much damage too!' Which support with a high pick and win rate is entirely damage based? Most tier 1-3 supports right now are champions who were actually intended to support their allies! Granted you've Morgana, but she was MADE for support + damage.
Anyway, I like the damage. I like that games end sooner than never. Why? Because 50-60 minute long games are stress-inducing nightmares that, often enough, result in massive disappointment.
If there's a team comprised mostly of people making too many mistakes then the current meta just makes it so they earn their deserved loss sooner.
If both team are performing adequately then you can be assured a 30-45 minute match. And that's what I call a GG!