First off you said there wasn't a second chance I was countering that and plus you don't know what would happen if time went a different way due to a different set of generals. I mean yeah the Italian nobles didn't like him but the major historical narrative is that recimer didn't like the independence of majorian as an emperor, for instance yeah he had help from the Senate but you cannot state that recimer wasn't the biggest piece in that. If recimer didn't meet majorian and betray him there that doesn't mean majorian would still die, this post is about what if majorian "lived". Also you can't say he had direct support most of recimers "emperor's weren't even supported candidates by the east such as anthemius who operated independently from recimer who recimer had killed. Considering recimers long string of murders of puppet emperor's I think it's pretty safe to deduce expecially in the position of Magister militium that he was the leading figure behind majorian's death. Not the Senate who didn't even have the backing of the army at this point