The arguments against systemd come from the same people that love IRC, mailinglists, tiling window managers, split keyboards, don't have a mouse, debug with printf, main arch or gentoo, unironically write RTFM|LMGTFY, call users "lusers", play DnD, think Startrek and/or Star Wars cannot be topped, identify with the portrayed super hackers in media, and are proud of doing things the hard way just to feel some kind of superiority in their life.
Edit: for those who don't get it, I'm obviously not being serious. If you fit this mythical, stereotypical person... uh... good job?
Just because I ran arch with ratpoison and firefox with Vim keybindings because I didn't have a mouse wasn't out of superiority, twas cause I was too poor to afford a mouse at the time.
Acktuchlly, I had moved just moved to Colorado and ended up living in a family friend's shed for a couple months. Every few days i walked to the library for wifi to download shit and check email. My TouchPad went out on my acer aspire 1 so if I remember correctly I borrowed a friend's mouse to get it all setup and afterwards used only keyboard, but out of necessity. Eventually I did get a mouse, and I just use xfce now, but I seriously can't use a web browser without vim bindings now.
Well, I like IRC, ergonomic keyboards, sometimes debug using print commands, use Gentoo (Happy birthday!), play DnD and sometimes have to do things the hard way, and I like systemd, especially as a developer, I can test services right from my user account.
I think the hate comes from people who just want something to hate.
I meh IRC(no history without bouncers), rarely debug using printf, mostly debug in some GUI, but sometimes in GDB TUI, use Gentoo(HB, Larry the Cow), don't even know DnD rules, don't use systemd and really hate pulseaudio.