I can definitely understand feeling betrayed! I did at the end of s3, when I saw that all the foreshadowing/promises of change weren't going to happen (at least, not to degree I hoped for). I was also really bitter when they killed Amber....

Them letting LE go so easily after all that she's meant to the series is the biggest disappointment of all for me. I was suspicious of TPTB's priorities in general, but I didn't realize it was this bad.