Iwtl how to get through games i dont have an interest in.

My boyfriend likes games like the Dragon Ball fighting games or zombie shooters like COD or Sker Ritual. There has been warframe a lot here recently too but he has nobody to play his games with him except me. The issue with this is thet i don't like a lot of his games...id love to play them with him but i cant for as long as he would want. I get burned out really quickly or i get frustrated because i don't know how to do the fighting combos or i feel more burden than useful.

I buy games with him even to play them through with him and I can't get through them. Like the last one I'm wanting to say was Sparking Zero, and i don't think I even got past the Goku story because it gets too hard for me to do it, while he finished the game in a week. How do i get better at his games?? Ive tried the training modes if the games have it and I've tried just playing to get better but neither seems to work...