I think that actually it's very subjective and about what you are prioritising (or should). e.g. my instinctive response there was to say about 40-50% shit together, mainly because I'm worried about my relationship - but wtaf, how is that up to 60% of my shit?
Hearing you say yours is probably ending but only assigning that a maximum 20% value of your shit really puts that in perspective for me, in a good way - your priorities and emphasis are clearly better balanced than mine!
for your relationship troubles regardless however x
I have a good job, I have a great 18 month old kid, I live and work and have her nursery all within a 10 minute radius around a big gorgeous park. We've just bought a house on an affordable mortgage and are doing it up just how we want it. Surely that's at least 80% of my shit together, objectively? But I let things that are actually far less important loom too large, I think, as my priorities and mental state aren't fantastic. So I don't feel very together.
On the debit side, I'm not in good physical health as I'm sleep deprived and run down so get every germ going, and I'm not in good shape as I never really was and made zero effort to 'snap back' after childbirth. And, as I say, I'm very concerned about my relationship. These are the things I need to get together. I also just lost my mum to suicide so that is a big debit in the mental togetherness column - on the other hand, it's also an object lesson in how important it is to keep proportionate perspective and not allow your worries and hang-ups to take over and stop you seeing the good things and successes and possibilities in your life.