Just spent an hour and a half trying to get to 2500 couldn’t even get past 2100

To elaborate once I hit about 1600 I hit a wall all three times I tried it. I tried different difficulties, different orders, everything. But once you get to 1600 you just start getting fewer and fewer points

That's just how tough the grind is for Archery 2500. You see how long it is for Cycling, Canoeing, and even Frisbee Golf. It just takes time , skill, and a bit of RNG. Don't worry about being inconsistent. Just try to make progress towards your 2500 goal and eventually you'll get there.