2 Corinthians 12:10 That is why, for Christ’s sake, I delight in weaknesses, in insults, in hardships, in persecutions, in difficulties. For when I am weak, then I am strong.
Would you like to be disabled (if you are not already)? Would you like to have a speech impediment (if you do not have already)?
I don’t think it is a case of wanting to be worse off here Paul is talking about, but the fact He has accepted how he is worse off without fear.
I am sure he would have complained at some stage of not having everything he wanted, but to get to the stage where you accept what you have wrong in your life and can use it to teach others about grace and mercy is a good thing which Paul is showing here!