Smogon isn't forcing you to use anything.. you have free will, if you want you can use Mightyena, Pachirisu or whatever you use on your in-game teams.
In fact even Smogon doesn't dictate what is OU, nor does it dictate standards. What happens is people go online and play on the Pokemon simulator "Pokemon Online". People use what they want, and every month usage stats are tallied up and a list is created. This list is OU.. the top most used Pokemon. In no way does Smogon dictate these as "the best" nor do they say you should use them.
Technically speaking Smogon doesn't really do much of anything. Usage stats and Pokemon sets are formed by the players. Bans are also voted on by players. There is no singular "Smogon" evil entity trying to sap the creativity out of the game just tens of thousands of players working together.
I agree with you. Blaming smogon for dictating Pokemon is like casual Halo players blaming mlg for ruining Halo. It just makes me facepalm.
Anyway, I dont hate any Pokemon, but I dont like them all either. Some I just dont care about. When I replay games I just figure out what team I wanna make before I start and just catch them when I can.