2 inf should always be able to kill 1 guy, not being able to kick that guy will just lead to necessity of breaking his shield, which is gonna be more stupid than kicking, cause 20s smorc spam hitting won't improve 2v1 gameplay.
Right now still you have a chance to handle 1v2 even against good enemies, yes it is hard, but if you keep yourself in a position where only 1 enemy can reach you and agressively fient-spam him, not letting him kick you, you have a chance.
Imo 1v2 balance is fine, 2 players should have a great advantage, this is a basics of MnB
What about duels, you guys should also complain on sword right swing being op, it hits you, dealing damage and preventing your attack. Kicking is a natural part of bl gameplay and for being good 1v1 you should learn kicking and avoiding kicks. Footwork was a key infantry skill in both bannerlord and warband