Wanda made Hawkeye in HoM. She made the walking plot device that is Layla Miller. She made Layla Miller perchance to meet Hawkeye and the human resistance and give them their memories of the reality that existed before she remade it to suit her. She didn't lose in HoM she engineered her own defeat. And even then she wasn't really defeated.
One can easily extrapolate that she's as much one with reality lego as Iceman is one with water - she can make and animate "reality Wandas" in the same manner that he can make Icemen. Kick down her sandcastle and she can likely just build a new one.
They seemed to want to make her akin to a modern Jaspers except not evil. And Jaspers would beat this JLA.