I had a problem in this regard. I failed my initial commercial checkride twice by the same DPE. I did a little soul searching and resolved it to three different things:

Case 1) My flying skills are so poor that, despite my instructor’s best efforts, the FAA cannot certify me as a commercial pilot.

Case 2) I’m a competent pilot but was poorly trained by my CFIs and cannot be licensed by the FAA with my current flying standards.

Case 3) I’m a competent pilot, my CFIs trained me well but the DPE was gunning to fail me before the checkride even began.

So I went up with no less than three (3) CFIs who couldn’t find anything wrong with my flying ability. I then took the commercial checkride with a different DPE, who passed me with flying colors. Conclusion: the first DPE was a total prick and either trying to fail applicants or specifically part 61 applicants.

Now try explaining that to a potential employer.

I’ll continue on and get my CFI, CFII, MEI, maybe a seaplane rating or possibly add helicopter onto my list of checkride. If I fail another, I’ll give up on the idea of flying for a career.