Male infertility tearing us apart

I need to vent and I hope I can hear similar situations from others.

We found out a year ago my husband has no sperm count after trying for our first baby for 2 years.

Been seeing an urologist and I feel theres no point. My husband continues to smoke pot multiple times a day, drinks multiple drinks with caffeine a day, and basically doesn't follow any instructions the urologist says. He does give himself the HCG shots every other day.

I feel all of this is tearing us apart and it's out of my control. Its turned into constant fighting and heart ache. I truly am lost and dont know what to do. We are suppose to see the urologist again soon and I dont even know if theres a point in going back if he cant even do the instructions hes given.

He wants to have a baby and I know hes hurting and he keeps telling me he just feels hes not suppose to have kids and feels theres a deeper problem and his smoking and caffeine arent the problems.

I am so upset and frustrated idk how much more I can do this.