Hello and all that!

1.) Dislike of new players is not something unique to FFXIV, or gaming in general...that said! Some people need to remember that we are not just bits of data in the system, but each person is a real person behind the computer/console (usually.) Some things get hit harder by the "hate" more (Castrum/Prae cutscenes probably being the worst.)

2.) While I can't say I've played a LOT of MMOs, many of them tend to have a good chunk to a lot of their content at endgame, as outside of when your game first comes out most of your playerbase will be playing at level cap, and thus the end game. In my opinion this MMO is actually better about not JUST being about the endgame...but endgame is still a big thing. I do agree with Lorielle that on the whole, 50-60 is MUCH more engaging leveling wise then 1-50.

3.) See the answer to 1 on this and apply it to everyone instead of just new people. You'll have jerks, you'll have quiet people, speedrunners, slow bros, sometimes bots...and you'll also have people who are talkative, there for fun, good-natured and the like. Really the biggest thing that sucks about the DF is that most of the good people aren't on your server it seems (not you but "you" in general~)