Ehh, you just have to look past the arguments and inane people. I run a small-to-medium open source project (the Min CSS framework, http://mincss.com) and I get plenty of inane comments, criticism, and personal attacks. However, I also get plenty of nice comments that make it all worthwile. For a project as large as systemd, I imagine that this is many orders of magnitude more extreme.

As with any group of people, the assholes are the loudest, and if you're writing software for a huge group of people a bunch of them are going to be really loud assholes.