I think the hostility will (actually already has) lead to a lot of potential users turning away...maybe trading XMR, but never using it as a trusted project/currency.
I have long given up on REALLY understanding which anonymity features are better...but my guts tell me, ZCash has a much better reputation within the influencer community (founders and devs of other projects/currencies) besides maybe bitcoin core, who seem to value XMR highly...
The only thing I see XMR stronger than ZCash is that ZCash's founders and devs are existing public people...with XMR at least I know only of FluffyPony as someone public....
Why is that important? Governments are still far from understanding the crypto sphere...at the moment they think, BTC may be more than a trend, but once they understand there are projects/currencies allowing to hide who is sending how much where - boy - they will freak. And then all publicly available people involved, have some problems to solve ... ;-)
But I think, XMRs greatest enemy is their handling of users and potential users...