You can hit 3-4 from the city, but that's about it before you leave. I too thought the difficulty curve was a little rough (though I play on Hard), but it's really about engaging tactically and utilizing everything you have to your advantage. A 4v13 is actually pretty easy if you have a caster and a chokepoint. The explosive guys can be shot or Teleported into clusters of mobs and they usually 1-shot them. There are environment barrels to utilize in most places as well.
You're meant to learn and 'get up to the speed' through trial and error, instead of hand holding in the early game. Proper engaging and positioning is really what makes the largest difference, in my opinion. Don't charge your melee in, kite through chokepoints, utilize CC, use proper weapon types, etc.
