We pay $200k+ at junior levels, so I don’t really think it’s bottom feeders.

There’s only so much information you can glean from 30-60 minute interviews, and some people are good BS’ers and just turn out to be lazy when they start. It’s unavoidable.

Plenty of people with top grades, from top schools, and relevant previous experience at a great company, who join and then how low quality of work and productivity, regardless of training / feedback.