Another overpowered rework/new champ

Every time Riot puts out a rework or and new champ that is overpowered I can not help but think they are horrible at their job or it is purposeful to sell skins and such for the champ. I realize that it is not every time, but I feel like it is at least 75% of the time. Is the PBE so bad at representing the game that they do not see problems coming. Each time that it happens and I need to waste a ban for a week i question more and more why I am still playing this game. Recently I have been playing a lot of aram because these issues usually are not as big of issues. Is this just me or are there others out there who are slowly losing pleasure in the game because of issues like this.