The internet is a fickle creature. I get a kick out of folks who tear down others work but don't show theirs. It's not limited to this forum, its anywhere that you can make or fabricate your own items. Keyboard critics, IMHO their opinion (as well as mine) is worth what it costs.
I have a couple old books on muzzle loaders, in one of them the author comments on fine original examples of muzzleloaders that have survived. His thought was that those rifles either belong to wealthy individuals or were not working everyday rifles, therefore they were preserved and survived. I'd be willing to hazard a guess that the "everyday working" rifles and their accoutrements were plain and simple, even ugly to some. But they were functional.
I like your bag, it's unique and you did a fine job. This year has been a year of firsts for me, I retired, did my first real muzzle loader build, I made my first knife and sheath, and I am working on a small ball bag. It's leather, with a draw cord closure. Think a can huggie with a draw string at the top, LOL. None of these things are perfect or period correct, but they serve their purpose and satisfy me. And in the end, that's all they need to do.
Good job.
Justin