Those two dungeons are the only ones that have that problem, so don't worry, you won't have to experience that again in subsequent dungeons. And that was really rude of people to vote kick you for being new. That's ridiculous. Like, even if no one wanted to take two seconds to help you out, that content is so easy that it really doesn't matter if one or two people aren't present for the fights.

But yeah, try not to let it ruin the game for you. Things should be smoother going forward.