Russ would only be pissed because the his mommy and daddy wouldn't be around to support his worthless ass the next time he pitches a tard tantrum at work and rage quits or gets fired again. Past that, he wouldn't care much. It would be a major inconvenience for him and that's it.His views aren't just inconsistent, they're downright sociopathic. I mean, think about it: he can't empathize with Hawkeye losing his entire family, just categorizing that sort of overwhelming level of grief and pain as him being "pissed". He can't empathize with Thor watching his own adoptive brother being brutally murdered right in front of his eyes; instead, he utilizes one of his favorite insults and just calls the God of Thunder a "fat drunkard".
In my eyes that shows exactly how much Russhole cares for his own adoptive family--that is to say, not at all. If Mama and Papa Greer and his adoptive siblings all turned to dust tomorrow, the worst Russhole would apparently feel is "pissed", and if given the chance to try to go back in time and save them, he wouldn't think it worth the trouble! Further proof of what a horrible human being Russhole is.
Someone said a few pages ago that Russ might be a sociopath, and I'm inclined to agree to a point. He obviously has no sense of empathy. Russ is so incapable of relating to how other people are feeling that the feelings of others may as well be nonexistent to Russ. And I think that's a big part of the reason that Russ thinks there is nothing wrong with stalking starlets and their families, demanding that women cave to his sexual advances, taking women to court for having the audacity to reject him (or for not even knowing who the fuck he is in the case of Swift and Grande), and basically all the other socially inept, bizarrely abnormal shit he does. He literally can't comprehend how his behavior is completely unacceptable. And so when people keep telling him "Russ, knock this stupid shit off, you're wrong." he flips his shit and doubles down.