Unfortunately you can't program around 6'1 168. I'm not an advocate of trying to GOMAD yourself out of every stall, but your leverages are going to be very poor at this height and weight.
You're going to need to read up on intelligent ways of increasing calories. Gaining muscle mass is not about just randomly shoving shit in your face until you are full.
You can do literally any strength program in existence right now and you will have issues with recovery and performance.
You don't have to eat unhealthy to gain weight, but a few "unhealthy" meals here and there are just really damn useful for driving up weekly caloric intake. You can grow on chicken and white rice.....but you have to eat a lot to get there.
Do you have an estimate of your average daily protein intake at the moment? All training related data right now is irrelevant: % of volume day, 5RM vs 3RM, NLP vs TM, etc doesn't matter right now.