Both of them suck at the whole relationship thing. Both are also abusive. Sakura never respected Sasuke's own feelings (lack there of) when they were kids. This kind of emotional abuse by forcing her feelings on him. She also tried to kill him when she thought she liked Naruto, but then realized she just finally gained respect for him as a ninja, so then she couldn't kill Sasuke. That would have been physical abuse if she was able to get a few hits in, or stab him. She often talked about him like he owned him, especially when talking to Ino. Her view of him before the chunin exams was purely based off of his looks. I get she was a kid with a crush, but god damn. I don't blame Sasuke for not wanting to hang out more with his team. It must have been draining to deal with her shit. The only reason why no one thinks of Sasuke's view in the past in regards to her is because he just appeared to not care at all. But his avoidance of her speaks enough for him on that matter.
Now Sasuke.. he hardly ever acknowledged Sakura as a kid. Why should he? She was yet another girl crushing on him, one with no skill other than book smarts. She wasn't interesting or a challenger worth fighting like Naruto, so he ignored the crap out of her. That was rude, but not abusive. I'd also like to note the countless times he had saved her ass (along side Naruto). Has she ever saved him? She did once. In the Forest of Death. That's all I can remember. So, I mean, he was pretty decent to her considering he could care less as a kid. He did try to kill her in Shippuden.. a lot. But he also tried to kill Naruto..a lot. That was out of trying to cut his ties and get rid of the people trying to be close to him. The Genjutsu scene? He said it himself. He was annoyed. He had a fight on his mind with his rival.. and all she was doing was *****ing and crying. He knocked her out, and picked something traumatic to her so she'd stay out for a few hours while he had his fight. I'm not saying what he did was right and that he wasn't a total jerk.. but at least he wasn't trying to force Sakura into a relationship she may or may not want. Ya know what I'm saying?