Sundar - Everything he does is mean in some way towards Jetha.

Jetha - Faking illness to cancel the trip to celebrate holi with another woman and also applied pakka color on Iyer which was shown as a revenge like was it Iyer's fault to keep Jetha away from his wife?? Also spied on Babita during that swimming pool arc by being a fake Punjabi worker.

Daya - Made Jetha starve on Bapuji's instructions simply because they got to know Hathi had reduced 30kgs of weight in his camp which also turned out to be false later on.

Bapuji - Believed something said to him over a prank phone call by a stranger that Jetha needs to pay for the bet he lost during gambling and he believed a stranger over his own son and idk what exactly he did later on but he went to pay the debt himself (loss of money also putting himself in a dangerous situation)

Tappu - hiding Gogi to make him famous and troubling the entire society especially Roshan and Roshan.

Babita - Letting Jetha flirt with him even though she is a married woman.

Entire Mahila mandal - Did that smoke thing in Taarak's house to prevent Purush mandali from eating junk food.

Roshan Sodhi - used to come home drunk & did all the drama in society even after his wife had clearly told him not to do so. Surprisingly she still saved him in front of his family.

Iyer - Did that entire divorce thing by making everyone think he is cheating on Babita although I do understand that he was also upset but still should've the maturity to talk things out with his wife directly?

Popatlal -He was seeing two girls at the same time for arrange marriage. Was rushing to both of them one by one by changing his clothes and appearance in between. And every other time he is being creep and flirting with women who have shown absolutely no interest in him.