You should really pay attention to Sean's advice if you are going to keep with flyfishing as a major activity.
Because a line's loop broke does not mean that line is total junk. Also, tying a loop into the butt of a leader is one of the simpler knots out there. Plus, you could cut the loop and tie a nail knot.
Before you go trashing a product, you should be aware of these things. It wasn't the line's fault.
That said, I'd question seriously the value of a 100 dollar line.
I have not cast it.