My son is 10 months and hard work too so I sympathise.
Personally I don’t think it’s normal for him to be crying that much and I think it’s a sign that something is bothering him. I am probably influenced by my own experience which is that my DS is generally a happy baby but he has suffered with silent reflux (which we discovered relatively late) and can also be unhappy if he is ill, teething or overtired.
I suggest going to the doctor and discussing the possibility of reflux (including silent reflux) and food allergies or intolerances, and any other possible physical/medical causes for him being so unsettled.
I also agree with PPs that you should take the pressure off regarding meals. You’re creating a lot of work for yourself by making everything from scratch and trying to force him to eat when he’s not interested is going to be stressful and upsetting for you both. I suggest you just offer simple things with minimal or no preparation, let him feed himself (or not) and anything he eats is a bonus.
Until very recently DS would completely refuse to be spoon fed anything, and even now it depends on his mood - he mostly prefers to hold the spoon himself. He sometimes eats a decent amount and sometimes barely anything. So we just offer simple things or Ella’s pouches and try not to stress about it too much.
My son’s naps finally improved when we got the reflux under control so if there is an issue like that it might be revolutionary once it’s sorted. In the meantime don’t pressure yourself to entertain him all the time, get a playpen and if he’s happily playing in there just relax for a bit.
When the nights and sleep deprivation have been at their worst we have done very little indeed during the day, sometimes I feel guilty for not doing more to stimulate him, but I’m doing what I have to do to survive.
Oh and don’t feel bad about using childcare, he won’t feel abandoned and the break will help you to cope better the rest of the time.