I think the main character sounds mean, not whiny. The snarling and the "It wasn't hard to lie to someone who was pathetic" line made me think she was too harsh. I understand the character's frustration, but in this piece she comes across as a vicious person, and I really didn't like her. JMO.
"An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way." -Charles Bukowski
"And by the way, dearie, your punctuation sucks canal water!" -The ghost of Vivian Vance