Breakdown

So I just found out my husband has been watching porn for the last 2 years. Now to some this probably isn’t a big deal but to me it is. He asked me how to close windows on his phone, so I’m the process of closing them I find one about gay porn videos to which I went ballistic bc of certain things in the past. ( found out he was cheating on me with a guy when we were dating and engaged) so digging into his browser history I find out he has been looking up gay porn, anime porn, cartoon porn, slut porn, anal porn, 18 year old porn ( he’s 29) and hardcore porn. I was completely broken, to me this feels like I’m not good enough so he has to find it from somewhere else. The time stamps shows he watches it while I’m at work or asleep. He started watching it a few months after I had a miscarriage. I feel broken and don’t know what to do. I love him so much ( I adopted his children when his ex decided she wanted nothing to do with them.) I looked through his phone for apps, texts, and numbers that I didn’t know and didn’t find anything. What should I do? I felt like leaving him last night and still kinda do.