I am pretty sure this same people would enjoy shows like GOT and applaud it but something dark on ITv is not tolerated because everyone is so used to that ghisapita concept of SaaS bahu and whitewashed mahaan female leads that they can't digest anything new and unique. I am pretty sure if this show had a male lead in maya's place , this question probably wouldn't even be posed.
Coming to the show, so what if Maya had a relationship with MJ and now with rudra. She didn't two time them. It will be a complex relationship as it is a tale of revenge and also that she actually found love in rudra.
Once she marries rudra, battle lines will be drawn and the real fight will start. It will be interesting to see which side rudra is going to pick as both sides have some very bitter and earth shattering truths that will make it very hard for him to side with Maya or MJ.