Sounds like you're lacking challenge in your life so everything starts becoming about success and not enjoying activities on their own merits. You need something with multiple benefits and which requires long term effort and persistence. Like learning a new sport or a new language. Something that you can't be good at right away but will help build up your self esteem with every little accomplishment. Failing that you can always consider tasks which are not solely about yourself and require thinking about others; taking care of a pet, voluntary work, looking after a relative. Just something that will remind you that you're not all important and that there are others worse off and in need of assistance. I think a lot of peace comes through helping others. It's a very good distraction in the least.