vacuum problems

Hi! I’m new here. I tried searching but didn’t see an appropriate answer within the first few pages of results, though I imagine this has been answered countless times. I bought a house two years ago and a Polaris 360 pressure-side cleaner came with the pool. When it works, it works. However...

So I have a ton of Crud in the deep end of my pool that I'm trying to get out, because the pool hasn't been opened in the 3 years since I bought the home, and the previous owner was neglectful before that. So I've read a thread that basically says I should try to scoop it out with my leaf net...

I have chronic pain so the pool is good for me, especially with pools not opening possibly this summer because of Covid. However, we've had a really hard time with our above-ground pool, and spent way too much on it so far. When we moved into the house it hadn't been used for a while, so...