I think the shit talking was not about the playing. Just dialing in. I need to make it up there sometime to hang out with him and @braintheory . Any of his amps properly dialed in would sound amazing. Trying to make everything sound as clanky as shit isn't really going to impress a lot of people.
I had a lot of people talk shit about my playing and my dialing in, and I learned from it and improved. I am much better at dialing an amp in than playing, but the point is not all criticism is mean spirited.
For starters, the gain should really only be turned up until a person can hear it start to come in. Then you adjust everything else. When you play at volume, the gain will come through on the power section. It wont get loose with the power section on a properly designed modern amp. But the saturation will make you think there is more gain.
Adjusting the eq is the next step. It is important to dial the eq in for the volume you are going to record at. If you have an amp that lacks in low end, you may raise the preamp gain to add it back in, but always mindful of not making it sound like staind or something with it fizzy and fuzzy as shit. If you like fuzzy fizzy messes, that is fine. But if you are dialing in a good metal tone, i would try to keep the clarity.
If the OP likes the way he dials it in, then that is fine. I hear plenty of guys that dial in a sound that i think is bad. I am not the final judge of tone