plumbing question. my sink was draining slowly about a week ago and it seemed like a pressure issue, so i backed the AAV off a couple threads for some airflow and it drained much more quickly after that. so, thinking that its the AAV failing, i left the valve backed off a couple threads until i had time to replace it and its been working fine.

a couple days later the dishwasher started backing up into the sink, so i took the AAV off entirely and grey water gushed out into the cabinet under the sink. does this sound like a clog down line? including a shitty mspaint drawing for posterity and views.