Husbands self esteem

Hi ladies! My husband had very low self esteem. He was chunky growing up but when we started dating he started working out and now has an amazing body (id love him either way) but he never thinks he looks good... And today he posted a picture and a lot of people started making fun of him (grown men 🙄) so he deleted it and was very upset about it. I wanted to cry for him. He has a hard time ignoring what others think about him and that makes his self esteem worse. I'm always telling him how perfect he is and how proud I am of him. But he's always looking for more people to think it too and I think it's because his father never told him"good job!" Or "I'm proud of you" growing up. He only told him what he did wrong and what he needs to fix so when it comes to ANYTHING he wants to be the best so he can make his dad and everyone else proud. It breaks my heart. How can I help build his self esteem? He is seriously the best husband and I just hate seeing him hate himself.