Alright I listened to feedback for my homebrew champion fighter. Here's the refined version.

"The main complaint I heard was that I had to many abilities tied to different resources. So now I added a new simple to track resource that makes it so I only need one ability tied to proficiency bonus. Anyways here's the revised champion fighter subclass and I'd once again like your opinions on it."

Level 3: determined

You have a number of determination points equal to your fighter level minus 2. You regain the determination points on a short or long rest.

"This might seem like a lot, but all the new features will be using this pool of resources."

Level 3: sheer will

You can only use this ability during your turn and once per turn. You can spend 1 determination point, if you do you can add a d4 to the first attack roll you make this turn.

Level 7: remarkable athlete

Exactly the same, it's mainly just for flavor.

Level 7: battle hardened

Improved critical. Your attack rolls are critical hits on d20 rolls of 19-20.

Consistent strikes. You can only use this ability during your turn and once per turn. You can spend 1 determination point before you take the attack action if you do give one of your weapon attacks advantage. Consistent strikes can't be used on the same attacks sheer will is used on.

Level 10: combat priority

You can only use this ability during your turn and once per turn. When you hit a creature with a weapon attack you can spend a determination point, if you do that creature has disadvantage on attack rolls against creatures other than you until the beginning of your next turn, until you're incapacitated, or until you're reduced to zero hp, however that same creature adds a d6 to attack rolls made against you.

Level: 15 Unyielding warrior

Superior critical. Your attack rolls are critical hit.s on ppdpp20 rolls of 18-20.

Improved consistent strikes. You have advantage on 2 of your weapon attacks instead of 1 when you use this ability. In addition if you use action surge this turn you you advantage on 3 of your weapon attacks. You still have to spend a determination point and it still can't be used on the same attacks sheer will is used on.

Level 18: unyielding determination

Survivor. you would be reduced to zero hp you can spend a determination point to be reduced to 1 instead. You can use this ability twice per long rest and only once per turn.

Will powered attacks. Before you take the attack action on your turn you can spend a determination point, if you do you add a d4 to all attack rolls you make this turn. These d4s stack with consistent strikes and sheer will. You can only use this ability once per long rest.