stop thinking about the actual hand he showed up with and start thinking about what RANGE OF HANDS he does it with . How do you fair against Acxc hands , sets, two pairs QJ TJ,KQ etc. At the end of the day you called a raise and caller with a low suited connecter in the BB leaving you OOP for the rest of the hand. fix that leak and the bad beat never happens. You were on the idiot end of the straight ( with redraws to potentially the nut straight flush but even that could be dominated by someone else hand).