I once won a STARTLING TERROR TALES #12 in FN+ condition, and the seller sent it in no bag or board, between 2 pieces of taped cardboard. By the time it got to me the book's spine had hit the tape and ruined the black cover. I returned it and still haven't found another copy.
For that reason, I'm always cautious about bidding on comics sold by non-comic book sellers. They either ignore requests for proper packaging or, as in your case, their attempts to package well do more harm than good.
Yeah, that's a smart move. This must have been 12-13 years ago, when I was just beginning to get into golden age stuff. Yep, been looking to snag another mid-grade copy of that comic for THAT long!