Many new tanks are anxious. No one wants to be bad or yelled at. Handling failure is part of being a tank, so keep things in perspective. When people yell at tanks, all they're showing is that they don't know how to play games and work together.

In FFXIV, I encountered friendly players at low levels. At max level, I encountered speed running elitists. If you don't have a good experience with DF, look for a friendly FC.

Tanking is definitely worth it. Tanks get to be heroes with a whole party supporting them. Tanks charge in first, and go toe to toe with the mightiest foes in the game.

Tanks learn marking, prioritization, positioning, threat, and mitigation. They develop awareness for the whole fight and learn a lot about the dungeons and bosses.

I don't think the learning curve for FFXIV tanks is too high. The difficulty ramps up gradually and guildhests help, although some things are poorly explained, like visual threat indicators.