That's a fact, not just you either, and not just the "Trump promotors" here. He has an uphill climb, and the distrust factor is substantial - nevermind the stated policy positions.
Ultimately, it's his problem to resolve. People are not apt to be persuaded by pundits or chatroom activity.
Probably not as tough a climb as one would think. American voters are sick of supporting people for both sides of the equation who later on let them down after numerous promises to the contrary. Trump offers a fresh view os things. Many are ready for just such a change.