I don't think anyone believes Robron are angel's or completely innocent to be fair perhaps some of us are feeling protective & Aaron being in prison is just about more upsetting than what happened to Robert! I feel some of the frustration is that Ross has hijacked their story line for the moment plus frustration is there due to the lack of screen time for Robron in recent months and Ross is taking the brunt of that due to being involved is so many of the big plots this year & Robron fans (which I am one) really wanted this shooting to be about Robert, - his comeuppance. It's softened the blow a bit that Andy was involved too that brings it back to their feud, I just feel there was no need for it to be all about Ross this time.
I feel Ross does work well as a villain type character, I'd rather he was an out and out villain then someone who hides is true self under a mask of false victim hood. I don't necessarily want him to leave, he just doesn't work as a domesticated type in homely bliss with Debbie with whom it just doesn't seem he has screen chemistry with, I could see him getting bored with her and felt he manly wanted her manly due to Pete having her, like wanting to break his brothers favourite toy or something due to petty jealously & insecurity. The reality could be difficult for him, being responsible doing school runs, baby sitting etc. If Ross were to lose interest in her Debbie & her kids could be in danger from him with his antics and given Debbie's history she should have learned to have better judgement by now.