I view Metti Oli as what Marquis de Sade would have loved. It is pure sadism. The dominatrix is the mother in law and the timid is the girls father.
He is seen as so stupid that the only father in law of that type in todays world would have to be from ignorant Azhagarpuram.
Metti Oli is highly rated because I guess some people love seeing other people tortured.
Manaivi on the other hand can be seen only to see Kowsalya showing her belly when she dances in the blue shorts in the title sequence. You can see her wiggle and quiggle like doping the 1970s boogey.
I have not seen her anywhere without makeup as she is shown in the title sequence. Here facial structure is good only with makeup.
Kausalya, if I were you I would not accept any amount of money to be an ass.
Manaivi is also a sadistic serial. The father of the groom is now the dominatrix and the father of the bride is the oppressed. Unlike Metti Oli this involves the same sex oppressing each other in a sadistic way.