The MikroTik UI is... an acquired taste. Honestly I don't think it's bad, I would argue that it's among the best GUIs out there for routers. I would be surprised if it's more common for MikroTik routers to be left in an insecure state that any other router, unless it's only because people who work on routers tend to have been trained on Cisco or Juniper and that training just doesn't translate very well to MikroTik. But I'm also not going to die on a hill of defending MikroTik's configuration design choices, there's a lot to be desired.