It wasn't really the project itself, but more the execution of it

Last semester we were tasked with writing a new programming language from scratch. We were a team of six people, everything went great to begin with. We discussed language features, the framework runtime it should run on and even what language to write it in.

Fast forward two weeks, nobody is doing anything but me, the two dudes tasked with helping me were both no-shows and the others were busy documenting the syntax and semantics of the language.

I basically ended up having to write the whole language myself with no breaks no help and no guidance.

A few weeks before deadline I completely burned out and couldn't do anything other than just sit and stare at the code; mentally exhausted and not in a mood to do anything other than doing mindless unrelated tasks. But alas work had to get done.

And it did get done... Sorta.
Our beautiful statically typed, statically scoped concurrent programming language that was supposed to compile to BEAM code was neither statically typed, statically scoped, and the output ended up being half-working elixir code that only worked on the most specific of cases.

I don't want to work with those guys again.