Please Help Me Save Silvia!

So ever since April I've been taking care of a Silver Maple in a container. At the beginning of September something took off a few of her leaves. Then a few weeks after I started seeing signs of pest damage. I had just asked my local extension office a question about my blueberry bush and they told to remove damaged leaves because it causes the plant to put more energy towards it's healthy leaves/making more leaves. And so I thought to myself "oh hey I should do the same thing to Silvia!". So I removed all of her leaves that had signs of pest damage or other damage which was a lot. Then literally a few hours after that I read to never remove more than a third of a plants leaves and I definitely did just that 🙃🫠…

So how can I save her? Should I fertilize her? I haven't in about a month probably. Also her soil is quite compact, should I take her out, aerate the soil and then put her back in? I'm worried that with the amount of damage she already has that taking her out of the soil would shock and kill her IDK. So what do y'all recommend? Or do you think she's doomed? (Btw I took out all the plants you see growing in her pot.)

I would ask the arborist sub but they don't take kindly to people with trees in containers…lol. The only reasons she's in a container at all is because she was growing out of the steps in my front yard so she would of fucked up the steps which would have probably made someone kill her. And I rent so yeah she went into a container. Also I'm not growing her with bonsai techniques because I have chronic pain so I'm trying to be as hands off as I can. Using the bonsai wire can hurt my hands and plus that method takes way more pruning + root pruning.