Eh, from a developers (and shareholders) point of view this is the basic requirement of the game.
If you are promoted every season then your squad can't keep up, unless you spend money.
This isn't FIFA or something like that where you purchase and then it's yours, this is a game designed specifically for season on season spending from the player. 'Built in obsolescence' is the advertising phrase I think, where a manufacturer purposely builds a product that needs replaced.
if you don't accept that, or find small ways round it, then you are going to be mighty pissed off every time you log in.