I can sympathise with the OP very much. I'm usually towards the front as I pre-book my seats well in advance, and hate when people try to trample over everyone else to run to the front. On the off occasions that I'm seated near the rear, I wait my turn patiently so why can't everyone else?

People in the back are able to get on the flight first, so they have to wait to get off. People in the front have to get on last (except elites ) so they are able to be the first off.

It annoys me when people try to cheat the system.

Next part is a bit OT:

Though it's not related to mainland China only, Singaporeans can be even worse. On my last CX flight to SIN, a bunch (and I mean many discrete bunches) of oldies decided that they didn't want to sit in the rear in their assigned seats, so they'd just sit wherever the hell they wanted to.

Caused a real headache for the cabin crew and also annoyed many elites who had reserved aisle seats near the front beforehand to find someone squatting in their place.

Luckily didn't affect me because I was one of the first to board, when I travel in Y I like to be one of the first on so that I don't need to search for the scraps of overhead bin space that are left after everyone else is done with it.