Does Final Fantasy XIII mar the great history of FF?

So I'm about 40 hours into FFXIII, towards the end of chapter 11, and I have to wonder, has Square ruined the series?  
The game is 100% linear, even though it supposedly "opens up" in chapter 11, I accidentally immediately followed the yellow arrow, and found myself trapped in yeat another corridor, leading me along a path exactly to where I was supposed to go next.  I find myself playing at this point just to finish, but I'm no longer enjoying myself, I just have a problem where I have to finish what I started.
I feel as if JRPG's have been declining for years, while WRPG's have continued to rise in quality.  This game just angers me on so many levels.