My husband [41M] is liking and commenting on semi-nude photos. How can I [40F] trust him now?

I recently accessed my husband's Instagram account and was taken aback by what I found. Upon clicking the search icon, I was greeted with a parade of images featuring mostly half-naked women. Curious about his activity, I dug a little deeper and saw thousands of these images he had liked, along with some extremely inappropriate comments. This left me feeling disrespected, betrayed, and questioning my self-worth. We’ve been married for 16 years and together for 22, and I believe I still look much the same as I did on our wedding day, even after having three children. I take care of myself, dress well, and strive to impress him. He claims I’m everything he wants, yet seeing the variety of pictures he liked makes me doubt that. Now, I find myself wondering what he's really doing on his phone all the time. The trust has been shaken, and I’m unsure how to restore it. While I understand that men may look, I don’t comprehend why he felt the need to like those photos or leave comments. When I ask him for an explanation, all I get is, “it was a mistake” or “I shouldn’t have done it.” He dismisses my feelings by saying I’m acting as if he cheated or had an affair, which feels like trivializing the situation to me. His actions crossed a line I can't overlook. A few days ago, he acknowledged he was wrong and deleted all his social media accounts, but I still struggle with trusting him. Has anyone else faced this issue? How did you navigate through it?