>>76394825I feel like that's long enough that you should know what works for you and what doesn't. Or be honest with yourself and is your "serious" lifting actually structured and consistent, or do you go to the gym 3 times a week but have no program or pattern or way to measure results? I don't know, you do, and be honest with yourself.
If you are consistent and disciplined and eat and sleep well, etc, then maybe it's not in the cards. Not everyone can bench 3 plates even if they do everything "right"