If WannaCry is so good at making software that can break an entire computer.... why couldn't they make a better UI?

Because the breaking part is stolen from nsa while the gui is built by them selves.

I heard they were going to use a JavaScript framework but didn't want to wait another 5 years for someone on the team to pick one...

wannacry is so good at making software 😂😂😂😂😂😂😂😂 now are we talking about the same wannacry that was stalled by a domain name? in all reality to me it looks like a script kiddy going to college for computer science started picking code snippets and kept compiling until it worked like he/she wanted it to