Gonna lose fish if you don't check these things
I know we've all done this: pulled a lure free from a stump or rock. My partner was losing fish until I told him to let me see his jig hook. Sure enough after he pulled his jig free from a stump, it opened the hook gap from parallel to the hook shank to near 45 degrees upward. Plus I noticed his hook wasn't as sharp as it could be so with pliers and file I solved both of his lost fish problems.
We were both using braid and hadn't bothered to check for line wear. We didn't lose fish, but did lose jigs to the stumps we got stuck trying to pull them free, even though bronze jig hooks will usually open up and release from wood. Hook gap has to then be reshaped.
The other thing he was doing wrong was reeling like crazy after setting the hook. Crappie especially get docile when being retrieved slow-but-steady and actually swim towards me until the last second. Too much jerking when reeling fast loses fish due to the the hole made by the hook getting torn larger. Other species will swim sideways or down and requires the rod tip to follow them while reeling in slack line. Gentle as you go can not be stressed enough unlike bass or pike which need more power and a heavier line.