Right now nothing can be done as the segwit has gained around 30% support from the miners.
You're wrong
If non-Segwit blocks are not relayed at all, the 30% of miners that do make Segwit activating blocks becomes a larger proportion of the network automatically, as the non-Segwit miners effectively don't exist on the network, because they can't get their blocks on the chain.
Miners will soon either change their minds (some large pools like F2Pool have said they would support Segwit in the future anyway), or be put out of business mining nothing.
Problem solved. Let's do it, IMO