Hello, new user here. So I moved into this new place a few months back and everything was fine until a few weeks ago when my kitchen double sink started to back up. I removed the trap and the pipes to see if there was a clog but nothing. I tried the old baking soda and vinegar hack but nothing. I then bought a 15ft auger at Lowes (the 1/4th Inch) and slid it inside the pipes to see if the pipes were clogged further down but it did not seem clogged, as nothing was coming out nor did I feel any obstructions while snaking. The double sink water comes back up and backs up into both sinks when I run water and takes forever to drain. A few days ago, I noticed the water coming out of the dishwasher so I turned it on and the dishwasher water backs up into the double sink as well and it stinks like rotten eggs or something like that. The garbage disposal looks rusted when I look inside and I think the garbage disposal might be the problem but I’m not sure because as I said, it was working fine for a couple of months there until recently and I don’t use the garbage disposal at all, I throw away the scraps in the trash can. Does anybody have an idea of what’s going on and how I can fix it? Below I have attached a picture of how it looks under the sink.