Is Mahir back for revenge

Reasons for me thinking this

It always goes naagin kabhi apna badla nahi bhulti, with the naagin taking revenge from the humans who wronged her (killed her family) but Bella/Ruhi revenge motive didn't hold value after Vikrant was shown alive and not as a good person. For the first time in the three seasons I think it's the naag/naagins along with gidhs or whatever that other ichadhari group is, wronging a human.

1. Bella gets married to Mahir for revenge.( I know she loves him and he is not angry at her and all that but it did start at revenge. So I started the list from here.)

2. Vikrant wanted him to be killed by Bella(Sumitra's instructions probably). Again I know Vikrant wants what is good for Mahir now (well actually Bella and if Mahir is well so will Bella be, you guys get the point, I hope) but a fact is there was a point where is wanted him dead.

3. Sumitra who meant so much to Mahir turns out to be evil and take away his memories. In previous scenes the naagins parent died and they wanted revenge. Parents death is definitely a big blow. But what about when the person you thought of as your mom is physically in front of you but she is a whole different person. It would be like you can't even think about they happy moments of the past cause that won't just remind you that you lost your mother but also make you realize you were living a lie.

4. He lost all his memories of the woman he loved. Sumitra and her gang affected his mental stability. They harassed him when he had a child like mind.

I know there are times where bella and Vish have helped him and took care of him so of course he won't have any grudge with them but that guy did loose his family, memories and sanity at one point, then finally left to die in a burning building due to a naagin, specifically due a naagin who he considered his mother and loved more than anyone else for years.

Very honestly I think the poor guy was wronged a lot without any fault of his (well unless you consider trusting and loving the woman you considered your mother a fault).

So what do you think is Mahir playing a double role with Sumitra as Krish to take revenge.