You sound very underconfident OP, are you sure it's not depression or something?
You're underestimating your child's ability to learn. Ok, you get out crayons. Watch your child. If he goes to draw on something he shouldn't, stop him. If he does it anyway when you're not looking, apply an appropriate consequence like saying you have to put crayons away now, get him to wipe up the wall etc (even if it's not really cleaning it).
The same with playdoh, I have a big oilcloth I put out on the floor, kids are trained not to take playdoh off that, I make them help clean up after so they learn making a mess is a pain for them as well. You could start out with a small amount of playdoh if that helps.
When lockdowns started, DD was 3.5 and DS was 9 months - remember when you could only go out 30 mins a day? Nearly killed me but I became much more resourceful. Eg spray bottle with water and a cloth - kid cleans water or fridge etc, wipe up water after, keeps them happy for ages. Daytime shower then let them squeegee the shower. Get a cardboard box and draw on it to make it a car they sit in, or cut holes for doors and windows and make it a dolls house. Etc etc. There are loads of books and websites with ideas for kids indoors.
We started out having the TV on loads in lockdowns but it's not great for them and means they get hyper as not using enough energy - we now have pre-set times when they watch to ensure they don't nag for TV all the time. I used to make myself an actual schedule when I was home in lockdown, eg breakfast, dressed, 30 mins TV, activity 1, go to the park, home for lunch, activity 2 etc.
Why are your toys all trashed? You either need to buy better toys or teach your kid to be more careful with them. And get rid of the broken ones. At that age we had a big box of mega blocks, not very messy. Or magformers are great as they're magnetic so easy to pick them all up!
Books are very good for kids - get fresh ones from library regularly. Flap books are good for that age. You can spin it out and read one then act it out, draw pictures of characters, etc. We used to read we're going on a bear hunt then you can act it out with toys and make the grass and water etc.
Kids are messy because they're creative, they can learn to minimise the mess but if you never let them get into things, you'll restrict their learning. I think you need to relax into it a bit more and find things to do that you both enjoy. Ideally you both get into a flow state and become absorbed by what you're doing.