I don't understand it...

Match one: I get my ass handed to me and end up 0-7-3. Yeah... absolute trash. Very next match: 7-0-4. I dominated.

How do I go from complete trash to kicking ass in one match? With the same champion? I do not get it. I get that you will fluctuate from match to match but those scores are polar opposites. It just blows my mind that in my matches I never barely win or barely lose. I either do really shitty or really good and I don't understand why.