Frustrated at work

Just feeling very frustrated at work at the moment. Tried to do something good. Thought that I'll be one step ahead of others but nope. And i hate how emails are being replied. Sometimes i asked for a yes or no answer as i want to eliminate certain factor before coming to a certain conclusion over a matter but answers given are always vague and answered to an open question. Feeling like a loser currently. Hopefuly things would get better.