Dude, @Starburst answered your question. You freaked and called him a troll. He may have said something you disagreed with or didn't want to hear, but you over-reacted. Thus, @123321123321's comment on you being in denial. Not the nicest of comments, but an astute observation.
The forum has agreed that low 80 is not a competitive GPA in Canada, that doesn't mean that you can't get into dental school but it means you are going to have to try hard to even get your foot into the door. Because GPA + DAT is literally the earliest and easiest thing that they'll look at to determine if you will move forward to an interview. Here I would concur in part with @TheMolarBear. Either way you answer should be to go back and work on yourself either through your GPA or DAT or EC.
Helping you with this comment doesn't give me any satisfaction because I have no interest in trying to prop up your ego, but in any career, I would worry about your ability to take criticism. Not everyone is out to get you, and if you lash out at people who are trying to help you, you aren't going to go far.
It's like @DentKoolKid said do you have a great personality that's suited for dentistry? Do people on this forum want to be your classmate? Reflect on your comments if there are any indications. Best of luck.