As someone who has been unemployed since graduation....

Getting no feedback, not even a rejection, after an onsite.

Trivia games

Getting rejected because of the lack of keywords on your resume. Example: I was interviewing for Walmart. Recruiter said I must've applied to the wrong position, since I had no Java framework keywords. This was for a new grad position.

Companys not asking any algo questions, not even STAR ones, and me still getting rejected.

Lots of lying by the recruiters that revolve around salary.