Is there any way to get Destructor or other OM arks if you missed the online event?
In the future yea but not anytime soon
The OM arks will be re-released eventually. For now you’ll just have to wait
As long as they aren’t gone for good
Subzeratops is still in gold eggs if you want
The only way to get gold eggs is to buy them?
You can earn some gold eggs, or buy them. Gold mission eggs are obtained in the OM or purchase