This thread is like the opposite of a CV! If you have a wife or partner of long standing and you ask them what you are bad at, better get a bit of paper the length of a toilet roll to write it all down on. Unless one of the things you are bad at is relationships, in which case, you'll have to work it out for yourself.
I will admit to not doing crowds or football, or football crowds. My vision of Hell would be to be trapped in a place with thousands of other people, all yelling their heads off.
DIY, though some stuff I'm good at, other things, not so good. I can make, adapt, and fix things. I hate painting and decorating. I've developed a loathing for flat pack furniture even though sometimes I have to accept it as a necessary evil.
"Reality" TV, celeb culture. Would rather watch an intelligent drama.
Not really into dancing. I did it when I was young, but as I've got older it's been too much like embarrassing "Dad dancing" or nowadays even "Grandad dancing".
Public speaking, though when I used to work people would tell me I was good at it. Depended on the audience, I suppose.
Team sports, particularly when it's hyped up.
Tolerating people who find it hard to understand that I'm quite happy on my own with my thoughts, thank you, and don't need to be entertained. The problem doesn't seem to be getting others to talk to me, it's getting them to stop!
And I'm sure that. given time, I can come up with more.