Let's put some of this in perspective. Right now, I'm only going to talk about "Battle Content", since that's what the majority of this thread is about.
  • There are 29 dungeons pre 3.0, as well as an additional 14 after Heavensward.
  • There are Five 8-man Raids in ARR (including one Savage version), and currently two 8-man Raids in HW, with Savage and Normal difficulties.
  • There are three 24-man Raids within ARR and its patches, and two post 3.0.
  • Not counting Extreme/Hard versions of fights and including Hildibrand fights, there are 16 trials in ARR along with Five in Heavensward
  • Diadem and FATEs also exist
I think it's a bit disingenuous to say the "game has no content", even if we disregard crafting, Golden Saucer, PVP and other systems. There are also a good number of areas and locations in game to explore, although like most exploration content it's most exciting to explore for the first time.

That said, I totally understand the frustrations with the content. People are going to enjoy vastly different things, and no single piece of content can satisfy everyone. For example, the "Single Hallway 3 Boss Fights" dungeon structure comes from many players' desire for quickly-ran dungeons. Dungeons and trials with optional areas and the like are oftentimes ignored in favor of speed, so the Devs build dungeons to satisfy there audience. Dungeons like "Aurum Vale" are oftentimes hated due to its slightly less standard design (though Aurum Vale is a bad example, since it's kind of annoying), and many players seemingly get annoyed with environmental hazards and the like. Similarly, some players want to level quickly and gear up fast as well, while others prefer a much more slow, steady approach. There isn't really a right or wrong answer here, it comes down to personal preference. As another example, some people want extremely dangerous open world content, where going outside of a city-state can be suicide without a well-equipped party. Others prefer a more relaxed open world that supports solo players better, and find such "open world content" needlessly tedious.

What kind of content do you really want to see in the game? That's my question. Is it "More savage raids"? Is it "All the open world"? Just saying "There isn't content" isn't helpful, but saying "I want more difficult, open world content like a beefed up Diadem" is.