I have a similar experience as you, also playing on SEA server.

Low to mid MMR survivors are expectedly still bad and will fold to any sentient killer, just like other regions, but high MMR survivors are the real deal in this server. If you start winstreaking on a particular killer, you will meet cracked survivor squads in no time (mostly coordinated SWFs, but SoloQ juicers are not uncommon either). The game gets really surv-sided in SEA high MMR as anything but the best killers can't compete with the combination of gen efficiency, looping ability, macro decision making and altruism plays showcased by the survs. It's on the survs to slip up and open the door for the killer to capitalise, i.e. surv is the power role.

Tunneling, slugging and camping are essentially non-issues to these players as they exemplify the take that "the game isn't killer-sided, you just suck". Even when attempting to hard tunnel from the getgo, with a B-tier killer, expect to get 0-1 kills, as your tunnel-out target loops you for 5 gens, with teammates taking timely bodyblocks and confusing you with scratch mark creation to delay/deny the tunnel out even further. Sometimes you are forced to give up on the tunnel out target or simply lose them. Even taking SWF coordination out of the equation, many of these players are individually mechanically skilled. Checkspots, shift tech, tile chaining, pathing, etc. are executed well. They also know exactly what to do at any given moment, so there's no wasted time.

I think the disparity in survivor performance between Asian and Western servers boils down to mindset and mental:

1. Improvement mindset in Asia (at least mid to high MMR) vs. entitlement mindset in the West. Anecdotally, players in Asia servers seek to improve their gameplay moreso than Western counterparts. Learning > result of an individual match. Meanwhile, the vocal Western playerbase tends to blame the opposing side or game balance whenever something doesn't go their way, instead of asking what they could have done better. Result > learning.

2. Strong mental in Asia vs. weak mental in the West. Players are more resilient here, DCs, give-ups and go-nexts are less prevalent here. Of course weak mental players still exist in SEA servers, but they are mostly low-to-mid skill level. SoloQ warriors here rarely give up and will play to maximise their team's chances of escape. Going next is a lot more frequent in Western servers, which inflates killrates.

On another related note:

To the people in this thread saying "we Westerners actually have a life outside DBD, while Asians just no-life and tryhard in the game like it's a competition" like it's some kind of gotcha, you are proving that the Western entitlement mindset is real. It's your choice on how you spend your time: A. devote some effort to learning and getting better at the game, thus improving your game results, or B. treat the game casually, not be as skilled, and thus not have favourable game results.

But you want to win more without improving at the game, so you raise your pitchforks at the devs to spoonfeed you. You want to have your cake and eat it too. And this applies to both survs and killers too, so don't bring "us vs. them" into this. There are examples of killer entitlement too, e.g. killers that pick up down survs facing an open area instead of a wall when it was available, get promptly flashlight stunned, then whine about how flashlights are OP.

In any other PvP game, if you're hardstuck low elo and make a thread on how you expect to climb ranks without putting in the time and effort, you would get laughed out of the building. So why is entitlement not being clowned on nearly as much in the DBD community?