Is it just me, or is Chucky now a hotbed for the most toxic/blatantly immature Killer players?

Your rationale here is very flawed.

The tactic of slugging for the 4K isn't toxic but people who use that tactic are? Can you you see the disjointed nature of that concept. Its not toxic on its own, its only being used by a toxic person.

What qualifies the person of being toxic? If the only measure of toxicity you have is that they slugged for the 4k, which by your own admission is not a toxic act?

Are you simply blanket assuming a player who slugs for the 4k is in some way purely motivated by spite and out to maliciously ruin the fun for others? Because going around assuming your opponent exists purely to ruin your fun is one way to get really pissed off at the game and you do it to yourself by thinking that way.

Other grownups? If defining yourself as "grown up" then it behooves one to point out that you have displayed here a very childish way to approach the game, with some fine examples of childishness. i.e.

• Letting your frustration make you consider quitting early and then acting on that impulse as notification spamming out of frustration.
• Defining players as childish for how they respond to loss while at the same time responding to loss in just a childish a manner.
• The preconception that one type of tea bagging must be premeditated but another is simply a knee jerk response to the game and ok, on no basis other than how you personally feel about each one.

I'm afraid its not some considerate or benevolent act to allow people to get back to their lives, as most adults should know what to potentially expect from a game of DBD and be capable of planning their time accordingly. That's called being responsible. Having the expectation that other players will take on that responsibility for you and attenuate their gameplay to fit that need is indeed a bit much.