You technically have no proof the universe around you is real. I could simply be part of a scientist's computer program that's talking to you, and you could be hooked up to it.
And that wouldn't change the way I view, interact or perceive the world in any way. So what's your point?
It makes no sense at all that a spec of dust exploded and created all of the planets, animals, humans all work and orbit, etc..
Well, of course that doesn't make sense, that's (specifically, what you wrote) is not what the Big Bang Theory states at all. If you're too closed-minded to try to learn something new because you can't be bothered to try to learn something that doesn't seem particularly intuitive at first -- then I won't bother explaining it to you.