> Hand-written in x86_64 assembly language
Oh.
Not sure if cross-internet capable communication tools constitutes the "worst" example of hand written assembly, exactly, but... yeah, it has to be up there. I'm sure it was fun to hack, though.
Assember is usually just considered bad/dangerous by people who have no clue about it and consider it something magical. It's not. At least not significantly more dangerous than C, which is still the language the most fundamental components of everyday computing are based on.
I'm certainly not afraid of machine code, I actually get paid to write it. But this just isn't a good choice technically. Though it's impressive and like I said was surely a lot of fun and worth showing off.