Stumbling Blocks

I am done with these dang stumbling blocks that have been put before me. I know that they are for my good and that they are there for a reason, but I still don't have to like them, right? For instance, once again I have been passed over for a position at work that I know that I am qualified for and could do a spectacular job at if I was given the opportunity. I get so frustrated when after almost 3 years of workign here, they still hire some one else. I just want to scream and say why? Why have you passed on me for the third time for this position? I have stayed and worked here and in the mean time you have had to replace 2 people in that postion that you could have given to me and avoided the whole fiasco. I know that the Lord is mindful of my desires and wants me to be happy, but sometimes I wish that I could see the whole picture so I would understand why this will make me happier in the long run. Or at least know the reason for the stumbling blocks that are thrown in my path.