It's not hard. At virtually every small company I worked for, not only is there no leetcode bullshit, firing wankers is as easy as giving them the termination slip. US has at will employment, 'you've been fired' is literally all you need to say, no explanation is required. You get hired after a conversation with a CEO, in my experience the hiring and firing process are both completed in under an hour.
I work at big companies. It's basically impossible. You have to transfer them to Milton's basement office and pray their inflated self-evaluations make them look for a new job.
