Can’t pass learn to drift

I'm having a similar issue. Drifting on PS4 is incredibly difficult. I understand how to drift - overcharge engines until 1 to 5 Boost indicators light up, click L3 to activate Boost, then Hold L3 while turning (yaw). Here's the problem (#1):  Pressing and holding L3 is VERY DIFFICULT on a PS4 controller. I've tried two practically new controllers - we got it in June, and rarely use L3 on any games. Both require extreme pressure to "Hold" L3. Clicking is easy, so I end up turning Boost on and off instead of Drifting....

Problem #2:  Drift function won't remap. I can remap every other function. But, not Drift. So even if my controllers L3 were a problem, Drift is greyed out and won't remap. That's a DEFINITE bug/problem.... I can "Edit" Drift and select another button (e.g., down on the D-pad, the balance engines function), and the game tells me Balance Engines is unbound from down D-pad; but the Drift function doesn't actually save to the new button.

Please fix! This is a very cool feature that I'm sure makes the game MUCH more playable and enjoyable. (Btw, despite my (default?) profile picture, I'm an over-30, adult man. I possess the physical strength to press L3 - this function stinks on that button, and it won't move.)