Because April was by far the worst month of his career. Since, he's been much better. When a guy never has a month in his career hitting much below .250, signs a mega deal and changes cities and proceeds to hit .177 for his first month it's disconcerting, sure. But, when he rebounds from that and plays the next 2.5 months to his career averages it should be noted that he hasn't completely s*** his pants. If you wanna hate the guy, by all means go ahead, but the guy has been doing what he's done his whole career since about May 1st.
I'll take a .436 SLG from Crawford. Nobody is going to argue that he's worth 20 mil. I hated the signing initially, but I think his defense is good and overall he's a pretty good player.