Do you play Real golf?
Then you know your handicap slows down the lower it gets. Same as here. Why should it be easy to get to Legend? If that is your goal.
Don't waste your cash on the game, if you feel cheated out. Play the game for fun, and forget for a second about the average. Just play for the fun. I bet, when you do that, you game will still improve, and suddenly you will find your scoring dropping again. It happend for me when I moved up to TM.
I couldn't get a decent round score in to lower the last .12 I needed to get my average below 63. So I just played the game for fun. Focused on other things in my game, and then the score started to drop again.
As far as I am concerned, noone forces you to spend cash at Pro Shop. Just chill, hang with friends, play within your CC, make a few rounds solo, forget the average and play this game for fun. It is a game you know. Not a race to become legend. Once yo get there, you really find something to whine about. ;)
If youre just here to get to higher tier, and you get frustrated about lowering scores ... then perhaps the game has peaked for you?