I made a 50lbs total pr at my last meet, almost exactly one year from the last one I did, at a lower weight class (from 275 to 242, 23lbs difference from what I actually weighted give or take) Total pr including only meet lifts since they are different then at the gym. You can watch the video
The only limiting factor to human potential is your own belief system. If you have a strong desire to get stronger, a will to succeed and a passion for progress, paired with decent amounts of training & nutrition anything is achievable.
All the greats say this so I will also stress it, technique, form,and posture! Sometimes getting stronger is just mitigating different weaknesses. Set small term goals, alone with long term goals,set a plan, gauge your progress, and see what works/doesn't work and make it happen.