Why the writers make Castiel out to be a villain so much if nothing he did as a villain mattered?

I don't think Cas was ever, truly, meant to be the villain of the piece. He did what he thought he had to do. Not because he really wanted it, but because he thought he would be a better choice than Raphael and Crowley. I think we were supposed to see him as a fallen hero (or fallen angel... haha!), not necessarily the bad guy.

I'm not sure that Cas' character is quite done and over with as everyone is making him seem. We know he's going to be in at least one more episode, and there's a lot of strong implications that he's the "boss" all the Leviathans are talking about. It's Misha that has the big question mark around his head right now, not Cas.

I don't particularly care for calling Cas a "mass murderer." Mostly because that delves for too deep into religion, and I don't want to have that debate hashed out. I'm just going to say that I don't see him that way, and leave it at that.

First of all,I thought he will gone--for real this time(since he died twice and resurrected back) cause I don't think SPN writer will repeat the same pattern over and over again.But.......

xoxo SPOILER ALERT xoxo(maybe haha,just teasing you)

Tell me I'm wrong...Cause I hate myself if I'm right!
-Sera Gamble knew that Cas fans upset(angry) since she did't gave a chance for him to make redemption....Guesss what she said?
1-"'Don’t fix what’s not broken.' That’s my philosophy."
That Cas line..."Dean its not broken",Cas-Dean relationship is scarred for life,which we already seen.
2-“We try to be realistic about the fact that people on this show do cross lines that can’t be uncrossed”
She basicly said he deserved to die but in cryptic?Or it might refer people in SPN has tendency to survive...
Honestly,I really--REALLY want him back,I don't care whether he still the same or not(angel,human...demon,or spirit).

Maybe to confuse us even more.

"I thought he was good!!! Oh my God I'm so confused!!!"

and now I predict that the next season he's gonna be the old Cas-Cas as we know him since everyone in SPN has 9 lives(NOT THAT THAT'S A BAD THING THAT'S WHAT'S AWESOME ABOUT THE SHOW!!!*except when someone dies then the show sucks like when they killed Balthazar...* ...I'm drifting off...) and then;

"HUH?! I'm confused! Let's just watch it and put our IQ to 0! =D"

and then the writers go;

"Yeah buddy, we reached our goal =)"

...No I'm not on drugs, my mom had me tested...