Am I overreacting about Instagram and Snapchat

My bf and I have been together for many years, good amount of ups and downs. In the past, he had a lot of random women on Snapchat. He dms random women on Instagram and gives his snap out. He likes a lot of bikini pictures of other women. Is this just how men are now? I consider it snapchatting women that aren’t close friends and liking bikini/mostly nude pictures of women crossing a boundary and disrespectful in a relationship. More details: In the spring, I saw a snap with a name I didn’t know and asked him who it was. He said he went to college with her bf. They had a long streak and she would be snapchatting him all day long. I could tell he was lying and I was worried so I asked her on Instagram if they were friends. She said she met him on a dating app but she has a current boyfriend. My bf knew her ex bf, not the current bf. She told me he cheated with her months before, she had no idea about me. He said she was lying, that he had told her bf that she was trying to cheat on him and they just had a streak but didn’t hang out. I broke up with him for a few weeks but he came back to me and said nothing like that would happen again. I am constantly anxious something like that is going on again because he’s doing all the same things. We are now long distance because I am in med school and he wouldn’t move with me (says it’s his job) but is going to move with me for residency. The other day, some random suggested acct on Instagram was friends with him and he liked all her bikini photos and only the bikini photos. I asked about it and he blows it up into a huge argument then ignored me for a day. Then I’m snooping other girls he follows and he likes all their bikini pictures/mostly nude pictures. He thinks me wanting each other to be transparent with social media violates his privacy. We continued to argue over the women on Snapchat and the pictures and he blocked me Instagram. He thinks I should delete all social media because it’s bad for me and if I just don’t see what he’s doing then the problem is fixed. He promises he’s not talking to women inappropriately or cheating, it’s all in my head. Every time I try to talk to him about it calmly to find compromise he gets heated, starts calling me mean things, and then ignores me. Then the next day he says it won’t happen again but I need to stop being nagging. This seems to keep cycling because he keeps doing what I consider sketchy and I bring it up. Unsure if it’s repairable, if I can convince him to be more transparent. I love him a lot and our relationship is great in every other way.