In those 5 years, Alabama hasn't done it at all and Clemson has. In fact, Georgia Southern, Marshall, and N. Dakota St (more than once) has done it.
Nothing upsetting about either of those Clemson wins except whiners like you pissing and moaning when someone doesn't think Alabama is great.
A reminder, in the 3 championship games played between the two, Alabama is 1 -2 against Clemson.
No one that supports any other team rants, raves, and makes excuses for every move, loss, and player on that team. When someone for one of those other teams does that, they'll get the same. None have yet done so. Stop whining about what I do or don't do. It's much more embarrassing than the ass kicking Alabama received last Monday.