Worst character in the entire LOST SHOW

Anyone else agree that Jack’s ex wife was the absolute worst character in lost?

I mean how does someone bring you back from most likely being paralyzed for life to having a normal life, marrying that person then cheating on him because he’s busy having a Doctor work life balance and he hasn’t been there…crazy

Not to mention, she was engaged already before meeting jack so clearly she had left another man for jack, rinse and repeat. Once a cheater always a cheater