Yes, every bad review you've read is true. She treats the character like a complete fish out of water even though Diana's been underground pretending to be a regular person for an entire year, and before that had been around for years and gotten her lumps in during Perez and Messner-Loebs runs.
Beyond that, she's being vain and petty and existential and it makes me roll my eyes. Why does Wonder Woman give a flying fuck about being "cool"?
And why is Nemesis suddenly acting like Xander Harris?
It might be the first comparison, the milkshake replacement with a Black Canary milkshake, bothered me and set the tone wrong. Even though Diana didn't display overt jealousy, using the Black Canary replacement (and then driving it home with a mention by Nemesis) implied competition. Diana's from Themiscyra, where women can excel without tearing each other down. It also smacked of the Black Canary replacing Wonder Woman in the post-Crisis JLA recon, which irked me.
Still, even taking that into account, the plot was a stock plot (And the art seemed rushed. Drew Johnson is better than this) and the characters were too far off-base to make up for that. Diana's still supposed to be savvier, Tom's supposed to be more competent. This is a fresh off the boat story for an entrenched character.
I've read a lot of stuff that I've been iffy about on the first reading. I've read stuff that was entertaining but not particularly good on the second reading. I've read stuff that was mediocre but still had charm. I've read stuff that was decently plotted and timed but relied on cliched characterization and stereotypes, and therefore ruined my experience.
This issue was just plain bad, and I don't say that about a lot of things.