Nah it's not like that. Really I think it's a waste of time to argue that Vriska was anything other than completely amoral. Her entire worldview is that being fiercely competitive and trusting only in one's self is the best way to get ahead in life; what makes her interesting is that she's exactly right. sure, it cost her a lot of friends and close relationships, and maybe she wished she could have let her guard down around others, but for better or worse, that simply not the reality she lives in. So instead, she played it to the hilt and played to win. We know she had a chance of singlehandedly beating Jack Noir. Who knows how far she could have gone if she had just stayed true to her principles? Instead, she's dead now (and this is important) because she trusted a comrade not to stab her in the back.
I love Vriska about as much as anybody, and this is pretty much the perfect culmination of her character arc.
Upon this a question arises: whether it be better to be loved than feared or feared than loved? It may be answered that one should wish to be both, but, because it is difficult to unite them in one person, is much safer to be feared than loved, when, of the two, either must be dispensed with. - Niccolo Machiavelli "The Prince"