Your text..Don't want to be a troll, but I never paid for anything in the game except the game itself and WFA.
Relic will NEVER see any Cent from me.
Good players know how to win with non-OP commanders 
Yes this is kind of the thing, really good players can win with more sub-par abilities. Take Magic The Gathering, for example, every 3 months a new set of 180-260 cards comes out. Every set, players of the most played competitive format, Standard, bitch and moan about how few of the cards are actually good enough for a competitive deck. You can build okay decks with sub-par cards and really good players can go to certain tournaments and win with them, but on the whole the best cards are played in the best deck for the best chance of winning consistently.
For anyone asking for all 100% of commanders to be competitive... it won't happen. It CAN'T happen, for something to be good, it has to be better than something else. Every 3 months millions of players spend HUNDREDS of dollars to buy boosters for a chance at 1% of the set's good cards (this is due to standard being a "rotating" format so every year cards from 2-3 sets will no longer be legal to play in standard).
Relic isn't forcing you to buy new commanders to keep playing the actual game. For those whining about weak commanders, there will always be those commanders which are better than others. That is how we define GOOD. When talking in regards to players, GOOD players can win with even something like NKVD Tactics. Some commanders you can play to have fun, but be ready to lose or keep playing and increase your skill. None of the commanders actively take away from any faction or handicap it, they all enhance them in some way(some more than others) and this is how I know there is no "worthless" commander.