This development is extremely annoying and frustrating.

deeply frustrating and annoying.

It can be extremely frustrating. It's tough to start out like that.

My back has stiffened up over the last few days which is frustrating,

I've been ready for spring training since the day after last season ended. It was extremely frustrating to have to sit on the bench and watch for the last five weeks. I never want to have that happen again.

It's extremely frustrating to sit around and look at the slopes and see dry grass where typically they should be covered in white. The hope is still there that we'll still be able to have a good season, at least the latter half.