You are prioritising the stuff over your own health. I know it feels wasteful but you will feel so much better once it's done. I know it is overwhelming.
I moved from a three bed house to a small apartment and I went through everything and got rid of things like this.
Big household items were advertised as free on facebook and so many people were delighted with the stuff.
Clothes, games etc were bagged up and taken to a charity bin.
Gardening pots were left at the top of the drive and people took them.
I hired three skips and lots of people took stuff out of the skip. The company I hired recycles as much as possible.
Any crafting stuff and tubs I gave to a local crafting group.
The bit that was binned would have gone to the tip and it is burned to contribute to the grid.
I've helped friends and they've helped me. Doing it alone is hard work.
After all that I've limited what I buy and I continue to go through stuff.
You will eventually save money by letting go off your storage unit.