A lot of people don't tend to socialize outside guild groups. This understandably makes it difficult for new or returning players to be brought into the fold. I think it's mostly a comfort-zone thing, that many are reluctant to break out of.

I know it can seem like it in some areas of the game, but not everyone is about drama. In fact there are a growing number of end-game guilds who are either low-drama or totally drama-free. They are mostly adult guilds but do tend to have entry requirements in place. This is usually not to be elitist, but to ensure they get the kind of people they are looking for.

If I were in a similar situation to yours, I'd try looking through the pages in the guild forum and see which groups suited my play-style. From there, it might be a good idea to chat with someone from each of the guilds that look suitable in order to figure out which would work the best. You never know what you might find - it could be a pleasant surprise.