After a year in the gym of gaining progress consistently I hit a plateau. No matter the supplements I took the protein I ate and the program I followed little to no progress was made. That continued for months until I took the free actionable step of upping my training intensity. Within 2 months of doing drop sets and taking sets to failure I have gained 2lb of muscle mass and 20 pounds up on my bench 1RM.
So if you're an intermediate lifer >1 year of lifting. The saying no pain no gain is what is gonna give you results, every set must hurt.