"it kinda is" is not exactly a ringing endorsement to 'probably the hardest game to make for any company.' Sure the scope and ambition for the game in theory is massive, will they ever get all of it out there? Doubt it. CIG decided to let feature creep rule them and you can see for yourself how far away this game is from launching. How much longer it still has to go also speaks to feature creep, redoing things over and over, not having a clue what they are doing, mismangement, time wasting, and so on.
Time will tell how far along they got before having to push it out or give up. Eventually this project will be 'finished' one way or another. Will it truly be the 'hardest game to make for any company'? That is very debatable.