Your squat is not that weak if you are doing it the right way. Not weak at all. Your bench, honestly, is the the worst I have ever heard. You must be one kinny kid, lol. I’d guess you need to pack on the pounds, and I mean a lot. I weigh 155 and bench 200 10 reps, 260 max. I thought I was skinny…
On the plus side, you sound like you have good speed endurance. Do a lot of squats and cleans, put on about twenty pounds, and focus on the 200/400. Good luck.