The worst are the new "tech companies with internal recruiters, tech tests prior to interview, twenty stages to offer, who moan they can't attract the best. Of course not! The minute you said tech test, I said goodbye, the minute you said internal recruiters, I laughed as I slammed down the phone.
The best companies that can and do attract the best, still keep it simple - direct face to face interviews, max two stages to offer, no fucking around with shitty tech tests, and making the time and effort for the interview.