2011 Ford Fusion Hybrid battery issues

I have a used 2011 Ford Fusion hybrid that has been having
battery issues since February-March-ish. I don't remember
exactly. I did not have the means to get it fixed so I bought
a charger and jumped the car when it was necessary. It is
now at the point where jumping it is required to get the car
to do anything and I don't foresee that lasting much longer.
The other day I couldn't even manually unlock the power
locks with my key, I had to get a locksmith out to open the
door, I read theories online of it being the anti-theft feature
so now I am wondering which battery could be the issue. I
saw elsewhere that last year some 2010 model owners had
an issue with the programmed battery age, I don't know if
that would be the issue with my 2011 model. But I am
wondering if there could be any reasonably cheap way to
get this fixed without sinking the price of another used
vehicle into this car that I already hate but also desperately
need. I am not at all well versed with cars and owning this
one has made me never want another hybrid again. Just
looking for possible opinions of what the issue could be
(which battery) or what fixes I could try to avoid a thousand
bucks being spent on a car I would happily watch be
crushed into a cube at a junk yard.