It doesn't look good, but doesn't mean they "weren't academic" as there may have been other reasons they didn't do well at school.
I only "passed" one CSE (Grade 1 Eng Lit) and one GCE (grade B Maths). That was simply because I'd gone to a crap comp and was bullied virtually daily, including physical assault (fag burns, punches etc). English was the one lesson where we had a decent teacher who put up with no nonsense in his lessons, hence why I could actually learn and study for English!
As soon as I left that hell hole of a school, I did part time, evening classes, etc., to get a better set of GCE's, then A levels, and then chartered accountancy qualifications, and finally a masters!
So, by your metric, I wasn't "academic", but in reality, given a better learning environment, I was!