Rather than hate Renee, I mostly just find her pitiable.
She tries hard to look after her friends and kind of wishes that they were more grateful and/or in a place to reciprocate more often, though she herself worded it badly - hard to blame her for that really, it's still a kindness to take on a thankless task and keep on it.
She also wants a stable relationship with someone who treats her like an equal, but at the same time she's also immature, impulsive and insecure so she has no idea how to get that and rushes into bad decisions like picking up jerks from a bar or blurting out the first thing that comes to mind without reading it back to herself. We've all been there, probably in our teens or early 20's so the chances are above-average that Renee makes us uncomfortable because she's reminding us of what it was like to be young and dumb.
Let's be charitable - rather than hate her as a character, let's recognise that she has a LOT of room into which she can grow - I mean, not all characters in her position will avoid the Scrappy Heap but Jeph's done it before (Clinton might not be a great example but *I* like him a lot more now than his first appearances) so it may all be part of a plan.