I'm gonna push back on this. Pre-Loria regime there was Cabrera, and during Loria we had Stanton (although he hasn't turned out that way due to injuries and strikeouts, he was still touted and seen as such talent).
That doesn't mean I'm saying they can't find a talent like that with this ownership, but the point of frustration for many here is that there's GM-type stuff that she should have been able to do properly (such as roster management that doesn't leave the team without reinforcements) that if she has a big say so in it (along with the rest of the decision-making "team") then she's doing it badly. Her, the decision-making team, or both. She'll get the most criticism, however, due to her role (besides Jeter).