High MMR has objectively gotten easier

18% means 18% of players passed the threshold. There's no percentage cap. It's only different if they lowered the threshold number.

You also don't know anyone's MMR so you're just assuming about yourself and your opponents. Four years means yours may have decayed anyway.

I dont even know what mmr im in these days, im either winning easily or losing horribly

The skill level of the average Survivor has absolutely stagnated or deteriorated.

After 10 years, rookie mistakes like healing under hook, getting 3 genned, farming teammates, etc. should've been almost entirely eradicated through cultural osmosis. You don't need to be an atmospheric scientist to know that dark clouds mean oncoming rain — it's something intuitive that we all pick up from simply existing in the world. In the same way, you don't need to be a DbD comp player to know that unhooking your teammate 5 seconds after they got hooked is a bad move. It's common sense. Its something that players should pick up simply by existing in the game and/or community, even if only briefly.

Despite that, the average match continues to be plagued by Survivors making basic errors, that there's really no excuse for anymore. Like healing under the hook against a tunneling Killer. If the Killer has come back to the hook every other time, why would this time be any different? It's something that should take only a handful of matches to figure out that it isn't working, and yet I still see Survivors with hundreds of hours doing it. The past few months, my teammate and opponent quality has felt worse than probably ever before.

I don't know about MMR specifically being involved or correlated, but I do know that Killer has become increasingly unsatisfying to play for me. A lot of wins don't come from me playing well, but instead from Survivors simply not putting up any actual fight. There's lots of instant give ups and fatal errors that just shouldn't be happening in a near-7k hour Killer's lobby, and it just makes the game boring.

In any other game I've played, the playerbase generally improves with time. I've watched this happen with Outlast Trials over the past 2 years. Crouching door traps is something that the game doesn't directly teach you, but almost every player knows to do simply from inuiting it, seeing another player do it, or hearing it discussed in a community space. Compare that to DbD, where almost 10 years after The Hag's release, a lot of Survivors still don't understand that you can crouch to avoid her traps. I was playing Hag the other day and the number of teams that just gave up or completely fell apart is baffling. I genuinely don't understand what is going so wrong with DbD's playerbase.

I remember in the early years before Survivor had any anti-camp, that coordinated saves against a camping Killer could — and would — still happen. Before there was anti-3-gen, Survivors still usually knew to avoid a 3 gen. Before there was an activity HUD, getting left to go second stage was still relatively uncommon. The average player seemed to have some game sense and understanding of role responsibility. Now that we have features to help with all the above, you'd expect Survivors to basically never fumble these situations, but I see these things most play sessions, and I truly can't understand why.

Game stopped being Survivor sided at 6.1 update and forward, the only time of recently where the game was legit survivor sided is when pallet density incident happen, but after that the game is now back to killer sided on average. also there is massive rng factor, recently ive noticed that the rng could shift from really hardcore survivor sided to really hardcore killer sided.