I’m learning that I HATE Derek

Ok so im only on season 3 episode 25 (the day Christina and Burke are getting married). Derek was just talking to Meredith about how he met a girl at the bar and then says TO HIS GIRLFRIEND “should you be worried that I woman? No. Should you be worried that for me flirting with that woman was the highlight of my week? Yeah you should be worried or something.” WHO SAYS THAT. He literally got cheated on and now is talking about he flirted with another woman. I’ve heard a lot of Derek hate on the page, and I didn’t know what to think because I’m only 3 seasons in, but he is the worst like genuinely