As mentioned in the above… train, train, train. I just got done killing 6 bandits in mail/plate armor comminations, with skull caps… I actually made a lot of money selling their gear.
Training your weapon and combat skills is definitely important… Also, the game is realistic in how enemies are able to close to an attack range… They can’t fit 30 people around you at once, only a handful will have an actual opening…
Like in reality, you USE that mechanic as part of your combat strategy.
Look for chokepoints… if you can funnel them towards you one at a time, your chances go up. Don’t fight in enclosed spaces with little room to manuever. Always have a way out.
Open ground can also be useful… the 6 I just killed, the camp had no decent chokepoints and too much to trip over or bump into… So I went in, whistled and got their attention then ran outside the gate to the open area of field outside the fence.
That’s where we fought… move so that enemies don’t flank you, keep them in your line of sight… focus your defense and attack on the one in range… Manuever so that they have to go around each other to reach you.
It’s an excellent combat system and it takes a lot from the reality of multiple armed opponents vs one person… train, look for areas of the environment that give you a tactical advantage, keep moving.