Is it bad if I withdraw before meeting my wagering requirements?

Mostly yes. Unfortunately, you will always have to fulfil the wagering agreements you have agreed to before withdrawing your money. Now, you can try to contact customer support and explain that you have accidentally withdrawn. For my part, I have never had a situation such as this. I am a compulsive reader and a stickler for the rules. If a sportsbook doesn’t want to reverse a withdrawal – wrongful or otherwise, though, you can’t blame the bookie.