No you did not. You DO have a right to demand that your content be removed from their network or even the account to be removed. But you DON'T have a right to own property within that new network.

You have no rights over what chains get generated from the origin chain. If you decided today to make your own fork of Steem and remove me from getting any coins from your new blockchain you did nothing evil or terrible against me. You simply decided not to incentivize me to participate in your new network.

I would clearly not join your new network unless it was somehow so awesome that I just had to join. However, nothing was taken away from you because it was a brand new network that you have no legal rights or claims to.