You might have unrealistic expectations bro. How tall are you and wgat is your bodyfat? The more muscle you gain, the harder it is to gain further muscle. The closer to your genetic potential you are, the lower your gains will be.
At the point I am, I'm happy to gain 3 or 4 lbs of muscle per YEAR
there are other factors at play too. Diet obviously is a big one, training (maybe you need to introduce a new stimulus and switch things up, or maybe you need a week off training), genetics, response to compounds, bodyfat (the more fat you have, the less your gains will be.)