That´s the point. Both units shouldn´t be there to combat Axis troops in an open fight. They should capture points behind the frontlines or overwhelm a lone support weapon. By no means should some armed farmers beat trained soldiers in open combat.
Give them a faster cap rate or something like that.
much of partisans - Red Army soldiers were surrounded, their preparation was very good (some partisans had tanks).
My opinion is to remove the partisans and the irregular and replace them with the saboteurs of the NKVD / scouts - appearing on 2CP.