Let’s look at this logically shall we ?
- “smurfs” or alt accounts may be at lower ranks to start but they will quickly go up in rank especially (as you have pointed out) they keep winning.
- throwers need to be reported as such.
- Blizzard has outright stated that one tricking is not against any rules and not an issue.
So in closing, be happy that the smurfs stomped you as that means you likely will never see them again as they rank up and you don’t. One tricks are not an issue, and report all throwers or they will continue to throw and disrupt other players gameplay.