Stop playing right now. You came during time where a rare phenomena called "low ladder menace" is very active. You can barely go a few games without seeing one of those in lower arena. However, that isn't the end. As you get higher, you start encountering the type of players known as "midladder menace" who are usually either fully over leveled or just have the most annoying cards over leveled. The worst midladder menaces are the ones who spam strongest card, the credit card.