Any other babies constantly crying?

Me

It’s just constant, for months. My baby is just not a happy baby. Can’t leave the room without crying, now he throws tantrums when he does stuff he’s not supposed to. I try to nurse him and he pushes away and screams. He eats 3 meals a day of solids. I’m constantly trying to entertain him. He has maybe 20 minutes of screen time per week. I have a partner but he works 24/7 so I’m the sole caregiver 90% of the time. I can deal with the loss of freedom and my son needing me 24/7, but the crying and screaming drives me nuts.

How do you cope??