It is always disappointing to see someone slam the instructors because I doubt any one of you was born with a licence in your hand.
I have done both... started instructing and then moved into the bush. The holier than thou attitude you did display in your first post is more than likely your problem with finding a job. I know you don't think what you just said was negative, but it was and it was quickly picked up. It will be quickly picked up by any interviewer. I know it's just the internet, but put on a happy face and never ever imply anything negative about the other guy.
I would bet that you are fighting your experience level here. You said it yourself, you can be upgraded quickly.... all the way to a nice corporate job or airline job. No matter how much you might insist that you won't leave (and you might not) the guy doing the interview is likely thinking, "liar." I had the same problem back a few years ago. I was too experienced and told to my face I would leave too quickly and they wouldn't get their time out of me. When I finally did get a break, I made sure to stick around and see that they got my loyalty, but eventually it was time to move on and up.
Here's the God's honest truth from a guy who was a CP and did the hiring and interviews. Don't !!!! on the guy's who got you through your licence, don't !!!! on the guys you fly with in the bush or the rampies or the son of the Air Canada pilot that just walked over top of you... any negativity on your part shows through and turns the interviewer off like a light switch, in spite or your experience levels. It shows a lack of class and character. I had a l lot of good help from friends, so never say you got where you are today on your own.. you had help. We all did.
That's my two cents, take it or leave it and good luck out there.