[Mehrbod]

Yep...Following the storyline makes me so bored and I don't know why!! maybe some kind of depression

No not really, it's actually quite natural. Watching a movie basically equals to watching other people having 'fun' before your eyes! It'll definitely make you feel down if you aren't having enough fun in your life.

I recommend watching tv shows - full package with seasons - instead, especially those that are long enough to keep you busy for a while :) That way you won't feel depressed anymore, as there's no single story line and things won't after an hour or two end forever.

There's some depression after the final episode though, but it's acceptable.