Removing Mods

I find the best way to do it is go to the last page on your steam workshop, change to 30 per page, and go to the last page then unsubscribe for the ones I want, moving one page back at a time. Once I am done, I do a quick double check to see if I want all of them. I might check my addons folder to see if I really want to keep my large ones.

Then I go into my addons folder, sort by size. Then I select all of them then, then deselect the large addons I want to keep to avoid redownloading the large ones.

Only now do I launch gmod to allow for the addons to be redownloaded