Red Orchestra 2 has only been out for a few days. People are still learning the maps, getting acclimated to the game and bugs are still being ironed out. RO1 was the same way(And still is in a way, you will always have campers) but after a while, people[some] will figure out that playing aggressive is the way to win as an attacker.
And in MY opinion...it makes the game play better and far more realistic. So, our opinions essentially balance each other out. On our server we encourage the defenders to defend (i.e. camp/tactical waiting/etc.) and the attackers to attack -- albeit in a controlled manner. We seriously believe rushers hurt game play and realism.
And so it goes in games. style is largely a subjective matter and different servers will encourage different styles. Find one that suits your preferred fast-paced mobile play. And enjoy it!
PS It probably won't be mine.
Apparently OP never played ostfront. Another thing to consider is that this game just came out and people are still getting grips with it, so dont expect alot of people trying to do the objective.
I have had no problems like what you get on cod where people are sitting in corners just waiting for you to pop round, when they have no reason for being there.