Need help

Hi everyone! The other day I brought up to my husband three things I think we really need to work on in our marriage. We don't have a bad marriage but there is always room for improvement. Then I asked him if he thought there was anything we needed to work on and he said "I need to stop being such a failure in our marriage and life" and I was so heart broken. I didn't mean to make him feel that way. He really is an amazing husband but again, there are things we need to work on. Any ideas on how to help build his self esteem or a different way of bringing it up to him? Any advice is very much appreciated.