The only 100% accurate reason anyone can give for why they were rejected, is that the reviewer felt they weren’t at the required level of quality to be accepted on the marketplace.
If it was a technical issue, like the wrong file type, then they would have been soft rejected and you would have been told what needed to be fixed. As they are hard rejected, it comes down purely to design and/or commercial appeal.
I think they’re pretty good, and they’re some of the better logos I’ve seen that have been rejected. If I was a reviewer then I’d probably accept most of them, but I’m no reviewer and I don’t know much about logo design. Maybe I’m missing something. As a result you were probably pretty close, but no cigar. Nobody can tell you exactly what is wrong with them as then they’d essentially be redesigning your logos for you… i.e. move that up ten pixels, rotate this by two degrees, reduce the thickness of these lines, alter this colour, use this font etc. The reviewers have tens of thousands of items to check every week, so there’s no real time for a detailed report.
You think they’re good, I think they’re good, but that doesn’t really matter… one or more people on the review team felt that they didn’t hit the mark, so there’s not that much that can be done I’m afraid.