You know what, we're allowed to not like something.
The problem today is that so many people want to pressure everyone into accepting everything out there, to embrace it.
They think all porn, all weed, all drugs, all drinking, and all sexual proclivities are perfectly fine.
But, what if someone takes it too far?
You are allowed to NOT like it. You are allowed to not want it in your life.

Porn has ruined so many relationships. There are people who think nothing is wrong with porn. Sure, if it's viewed in moderation and not to excess. But the only way you will find out what you have, is to be in a relationship with someone who likes porn. That's when you see how much porn they watch.
The same with gaming. A little gaming here and there is fine. But there are those who are addicted to it and it's ALL they want to do, like my nephew.
Being in a relationship is different than just casually knowing someone, even spending a lot of time with them. Any relationship brings pressures and stresses that are different than just being friends. Living together is the same, it adds pressures and stresses. And typically, it drives the person to view porn or 'game' even more.
The only way to know what you have is to be in a relationship with that person to see just how much they view porn, or how often they game. More than likely, it increases, and people such as yourself suffer for it.

There's people who have a balance, and others who don't. How do you know which one you have?

I would not stay with a man like your boyfriend. No way. This will only get worse. Talks with him won't work. Like you said, he goes right back to it.
Exchanging nudes and videos with other women and you are still with him? That's a deal breaker for me.

If you are putting up with this because of the 'times he's good to you', then that's no different than the countless people who stay in abusive and terrible relationships for 'the times he's good to them'.
This relationship is doomed. And it won't be made better by ever getting married or having a baby with him. I'm just saying, forcing him to 'grow up' and 'get with the program' is not going to work, either.

There's a true saying that I've quoted for years. I also see it a lot here on Reddit.
When someone reveals themself to you, believe it the first time.

He has shown you all you need to know. If you want to predict a person's future behavior, look at their past behavior. How much more do you need to see?
He's not going to change his ways for you. Love has nothing to do with it.
If I were you, I'd already be gone. This is a lost cause. Why invest in a dead end street?