Tying drain into old disused vent vs just use AAV

[Sokolq55]

Hello all! Kitchen sink is draining poorly. Flippers bypassed old sink vent. Can you advise on whether and also how:

1) Should I just put in an AAV coming off of the end of the P trap as in picture below (what adaptor would work here? Some sort of a T?) OR

2) Tie the existing drain into the old vent that is one joist bay over. How exactly would you make this tie in properly in terms of adaptors and pitch/height?

3) And last, is the way the existing drain is done under the sink proper in terms of the connected double P-trap contraption or should it be redone and how?

Thank you!

PS - pictures won't attach for some reason?

 

[Reach4]

Bad venting alone will not keep a drain from draining. There could be an exception for a septic tank. I am not sure. Venting can sometimes work around a drain line problem.

So get a drain cleaning person in. The kitchen sink often clogs where the flow turns from vertical to horizontal.

Basement? Is the sink under a window?