the best time to deal with Ms. Unfortunate was a month ago but hopefully the second best time is now – before & after?

I’m neglecting this poor baby – my dad has a new aero garden and it came with this little dwarf tomato variety. He grew too many so he showed up at my house with one. I’ve never had a determinate tomato before, and I put it in the back of my garden so tbh I had been ignoring it for a while… I tried to increase airflow by removing the more diseased leaves, and using string on my cage to hold up any sagging sections. I know I’m not supposed to prune a determinate but I figured she couldn’t get worse. Anything else I can do?