My bad, it seems I've been mistaking my Quest 1's low 72FPS refresh rate which causes me nausea as low FPS due to the game all along. My money's wasted on the damn thing. I can't play it because of the nausea. This doesn't happen with my 90FPS HTC Vive. I can play games perfectly fine on my Vive without nausea.
Moral of the story: Don't get a Quest 1 even if it's like 100$ or 50$.
Though I had to pay 650$ because of tax to get this junky Quest 1.