GWT.
Let me explain:
Tl;dr : someone fucked up, I took shit, it was a gwt project. In a sense I don't hate GWT because of the framework itself but because how I was introduced and forced to "work" with it.

Context:
Was working as a paid intern at a small company there were 3 devs 2 interns and one senior employee that only worked from home handling the shit ton of legacy VB6 code he wrote over several year and a boss with no technical knowledge. (Other unimportant people as well)
I was working with their DBA (cool dude) because I was writing statistic and report generating software.

Story:
The other intern was tasked of doing a gwt app that was supposed to use a input file.
Rather than asking the user to upload it with a file picker (I guess they exist in gwt I didn't got to dig in the framework) he was trying to load the file with a http request directed at the same host the app was running on.
It did not work.
Then his contract was other and the app was left in an unfinished state.
The boss then tried to have the app deployed, the remaining dev dodged the bullet invoking some bullshit because he was clearly incapable of doing it.
So it fell on me, couldn't deploy the app because it was not even close to working.
Tried to fix things and make it work.
Turns out he thought it would take me 3h to deploy when I clearly explained that the other guy didn't finish the app.
Boss got mad, threatened to ruin my studies and my future career.
Couldn't because my uni had my back.
Didn't want to see me anymore.
Couldn't break my contract.
Told me to work from home for the end of my internship.
I got 3 weeks early vacation and got paid, fuck him, fuck GWT, fuck his company.
Still got well marked for the internship as my supervisor was the DBA who was happy with my work.

Morality:
Don't let your intern unsupervised, don't let your main dev work from home when you don't know shit, don't piss me off and send me work from home.