Bad SMNs aside it's not a weak DPS or pull hate easily - Unless for some odd reason you're using Titan or Ifrit or Gauda in these fights. While true a TON of people don't bother controlling their pets, most have an innate -dt trait that negates most damage. While I wish SMN was designed differently, it's not "bad" or any legitimate reason to leave just because a SMN is in the group.