I was sent a HackerRank assessment. The tasks were not trivial but still pretty easy.

I had to wait over a month for any sort of feedback. It was followed by a phone interview with the easiest problem I've seen on one of those.

After a day, I got rejected. They said they're happy with my credentials and performance during the interview but they have a limited number of positions and can't continue the process.

I wouldn't mind that that much, but they've started interview processes with my friends even though 'they have limited spots'. When asked for more detailed feedback, there was no response from the recruiter.