Does many one have days where they hate people

Sian
Hi all
Having one of those crappy days. I work in a male dominated industry and was wondering if there's any other ladies out there that have days where they could quite easily murder every man that comes into contact with them!!
I'm a welder fabricator and am pretty bloody good at my job and some days it feels as if every bloke that I work with has to have there say in how I should be fabricating (I'm better at my job than what they are lol)
It's as if they believe because I'm a chick I can't do my job and I need there help!! Pfffft very annoying!! 
Well rant over, feel better now. Of to find a shotgun!