I am not hyper careful about my choice of daypacks. I have had a few and none have been horrible.
Although I do not care for Walfart/Ozark Trails gear, some of their overnight stuff looks decent. (I often like a larger pack than necessary) I got a pack from a former thru hiker (an estate sale) that is far too small for weekends for me, but I use it for training with water bottles. It has a rudimentary frame, but who cares.
I don't think you can go wrong if you look for decent stitching and stout fabric.
You know, I have even handled decent Chinese packs, although I have not owned one. I may buy one of those for my jump kit (a large kit for mobile first aide) for next summer.