Definitely not good but honestly they deserved it because of their arrogance thinking they had those two wild vampires under control. "Oh, Darlas just a tool." My my did that come back to bite them literally speaking.
Cordy, Wes and Gunn would likely have a different opinion on what he did had they been there to hear that exchange between Holland and Angel earlier in that very episode but it is what it is. Holland couldn't careless about the people Dru and Darla were out there hurting as they tossed back drinks at their little party, so why should Angel risk his life for them when he could save that energy on people who matter more?