I have many of the Studio Slips bags, and they fit extremely well, and are padded very well, much better than cheap bags. I have multiple posts here showing the quality of their work and the fit.
If you don’t like the bag, then contact Studio Slips, and explain why. They’re awesome to work with and stand behind their products.
I have a couple of bags from other popular brands too, and stopped using them because the zippers failed making them useless, and the padding was spec’d poorly for the equipment being carried, to the point that it transmitted shock to the gear instead of protecting it.