How to counter the same deck on Sanctum

I've been playing in the sanctum event for the past 4 days and I've been encountering the same deck over and over again. Out of 10 matches, 8 are a deck based on Rocket, starlord, gamora and Drax. How can I counter that, given that the combination is actually quite useful for the type of event.

Side note: It is also frustrating playing against the same deck.