[arkano]

> Having a paper written in 10 days accepted in the best conference of the field increased both my imposter syndrome, and the feeling that we are writing useless crap.

Are you sure you are not harsh on yourself? :) Maybe it was a good paper. If you are so worried, you can always ask the conference reviewers for comments; maybe they thought it was excellent.

> useless crap

You get enough "useless crap" down as knowledge and, who knows, one day you get to flying cars or the proof of Goldbach's conjecture.