How to win against ravenwing army?

Just played my first game against a full ravenwing army yesterday (3x9 black knights, 3x vengeance, etc.)

I mean, they are better than us in every aspect. Am I missing something?

I don't see how to win the trade war when they have 3x9 black knights waiting behind to adv|fallback|charge|shoot with good plasma shooting, have devastating wound on 4+ against monster and vehicle, ave insane OC with command squad, free heroic, etc. The amount of rules and bonus they have as space marines is insane. They even have a banner to resurrect guys. How could a black knight model be cheaper than a Flawless blade ?

Then, I'm sorry for our noises marines, because a land speeder vengeance is stronger, cheaper, more though, faster, damage 3 also at 36'' twin linked, etc. Their new 1DP detachment gives them ignores cover and and more.

Am I missing something?