This is inside-the-echo-chamber logic. People outside the techcrunch bubble aren't going to read that whole thing (seriously: that's a huge page!). What they are going to see is yet another story in the mainstream media about the "controversy" about whether or not Arrington raped this woman. See the very-different-in-tone coverage on sites like talkingpointsmemo.com for a good example.
Because someone who does read the story is going to then make a summary and that will spread. Which is the nature of news nowadays where tl;dr is the norm and people summarize nuanced and complex topics into little zingers.
How does that help his reputation?