I really do suggest searching for a FC. It'll be worth the trouble in the long run.
Also the kind of stuff you described I would definitely write a report on that kind of healer.

For new players I do think it's not too much to ask for basic knowledge in the end game fights but if you're new and just doing normal dungeons you should absolutely be able to ask if there's anything you should know about that fight right then and there on the purple line.

This goes to all the players out there but be nice when you give advice and be humble when you receive it. I learned how to play this game by healers literally telling me how to tank. I didn't get angry about it I just listened and learned to adapt. Healers NOT raising to prove a point are not doing THEIR job and as such I find this unacceptable and I would just quit in a dungeon like that. (and report, remember abuse is report-able!)