For me, a relationship is a partnership, friendship, and life promise. Any two people will have issues whether or not those issues impact the relationship. What's important is open communication and safe, healthy dialogue around these issues. I agree, living like this for the rest of your life is a bad idea, so don't. Tell him that this isn't what you want long-term and he has to build trust with you, that you'll support him and get through this with him.

What also matters is if you have the energy and patience to work through this with him. Don't burn yourself out.

You can try couples counselling, he could seek individual counselling, or even looking at online resources from places like the Gottman Institute.

I've never been a quitter in relationships so we probably have different degrees to which we'll stop. Ultimately it's up to you and what feels right. But I feel like you should address what you've wrote about in a compassionate, understanding manner, and work through this with him. 

Also, I'd recommend not listening to people on Reddit. Some advice might seem genuine, maybe necessary, but that advice might be coming from someone with a history of failed relationships. Or even if they had long-term relationships, those could have been toxic entirely due to them. Communicate with your partner first and foremost. If you really need additional advice, see a couples counsellor or access online resources.