.......and refuses to discuss handover list.

I have prepared a handover list detailing relevant information to assist with transition to colleagues.

What else should I do?

Any idea what I can do to gain the upper hand if this were true, sifu?

It may not be the best option but sometimes its necessary. Some people just don't want to co-operate. They love looking for problems even though it's not your shit to begin with.

pretty dumb thing to do really. last day is last day, and it's the boss' responsibility to ensure everything's handled over by then, and the person who's leaving can just ignore and chill (if they're smart)

I just show up in office 2 days a week, where the other 3 days I just left a message on Slack saying: 'working from home. drop me a message if I'm needed in the office'. and this was pre covid.

whatever problems is no longer my problem to solve.

my point is quite simple in the context of the original question from the TS. if the boss ignores whatever handover efforts that the TS tries to initiate, then it's the boss' problem later. he's not obliged to finish everything if everything gets dumped on him on the last day.

Sorry as I may be lacking work experience, but I'm curious as to why is this a problem?

Based on how some people are replying, it seems that emailing to the next PIC and having black and white proof is not a good idea? I thought that's actually the best case scenario. And if the superior remains unreasonable, it has nothing to do with you anymore as you'll be leaving anyway, in which the mess is not yours to clean up.

Please do enlighten me, maybe I'm still too young to understand different perspectives and factors in workplace conflict.