This thread is honestly as biased as it could be!
Sidelined means pushing a person away, not give him/her any importance and bringing them down unnecessarily but this is not the case with Rishabd. He hasn't got a negative rapport with anyone off late, when he was at his witty best housemates used to enjoy that, Sallu also complimented him in initial weeks of his entry, he took on men of the house in his initial weeks too, plus most importantly: he made his presence FELT in initial weeks.
However, ever since Priya's he's been fading away in the background. His wittiness decreased and he just could NOT make his presence felt anymore. Afterwards if any situation involved Mandy, regardless of whether or not she was at fault, he would pounce on Mandy even if it's got nothing to with him. Also lately if the men pounce on him then he surprisingly takes a surprised and quiet face, but can't keep the same composure when it comes to Mandy. And besides, he was actually the FIRST housemate who started swearing at Mandy and show her gestures. And lemme tell you what: she didn't even respond to that initially so there was nothing to 'give Mandy back' if that's going to be the next excuse.
He's lost his spark which is why some housemates are not taking him seriously, and even Sallu doesn't compliment him or call him out like he initially used to. That's because he's lost his spark. Dot. Yes, you could argue that housemates consider him competition but as for being scared of him? Nope! Mandy has been underestimated by EVERYONE in the house despite the number of evictions she's survived, but she's taken their views quiet sportingly rather being let down by it. Rishabd needs to buck up and understand it's the audience that could make him win, NOT the housemates.