Grip failing before the target muscle isn't a discipline problem. It's a plumbing problem — and none of the usual fixes actually reroute anything:
Chalk makes your hands drier. It doesn't make the lift lighter.
Chalk raises friction, which helps right up until your forearms simply run out. It solves slipping, not fatigue. And most commercial gyms banned it years ago, so half the time it isn't even an option you have.
Gloves protect your palms and change nothing else.
They're a callus solution wearing a grip-solution costume. A glove sits between your skin and the bar — your fingers are still doing every ounce of the holding. Some are thick enough to make the bar harder to hold.
Lifting straps work. In about six weeks.
Wrapping a strap correctly under load is a real motor skill, and a badly wrapped strap slips at the worst possible moment. Most people buy straps, fumble them twice in front of a full gym, and leave them in the bag permanently.
Mixed grip and hook grip cost you something.
Mixed grip carries a genuine, well-known bicep tear risk on heavy pulls. Hook grip means jamming your thumb under the bar and simply accepting the pain. Both are free. Neither is comfortable, and one of them has a failure mode that ends seasons.
It isn't that your back is weak, or that you're not trying hard enough.
It's that nothing you've tried actually takes the bar out of your fingers — and until something does, the smallest muscles in the chain keep deciding how big the biggest ones get.