They did. Umar pointed out ke he had 6 votes (very quietly though unfortunately). Karan said ke he had already backed out. Vishal said ke he would've backed out had he not had the most votes. Basically that had Pratik not acted like a child, they would've achieved aapsee sehmati.
But Sallu either wouldn't let them complete or talked over them and ignored these very valid points. Teja even said a few times that this is what I'm trying to explain to you - and he kept saying you're not explaining you're confusing us more.
Basically - it was an exercise in vindicating Pratik and trying to push the narrative that it's the whole house vs. lone lion Pratik.
If history is any indicator then in majority of the cases, the contestants who are bashed the most are the ones that end up winning or reaching the top 3.
Im sure Sallu knows what Pratik did is wrong and HMs are right but if he says that out loud, then ye jo tadka badi mushkil se mila hai wo kam ho jayega... so let the monkey (Pratik) do tamasha in the house, be the disrupter as long as he doesnt cross a line, damage property etc... But he is only being used to spice things up.. he will be dropped like dudh me se makhi when the time comes.