Your philosophy of having the best guy at every position isn't possible in a salary cap league. I'd love to be able to have a Pro Bowler at every spot but reality is that doesn't happen, so you have to have guys that maybe aren't the best but can fit your system and make some plays. Mitchell was that and is probably better than the two jagoffs they just brought in to replace him.
Well, mate, someone got up on the wrong side of the position bed!
No one is implying (though you are inferring) that every position needs a star or, as you call it vaguely "the best guy" at every position. (I thought the best guy, relatively speaking, was always the best avenue, bloke, but that's just me.)
A pro bowler at every position is a pipe dream and you know it, mate. I think you are drinking too much coffee or taking too many milligrams of grumpy pills.
Turn that frown upside down into a smile, mate!