Directional blocking is one of the most basic skills in the game, and with directional attacks forms the core of the franchise's signature combat system. It is not the fault of anyone but you if you cannot do it reliably, and if you don't want to learn that skill then in all honesty you should find another game. It is intrinsic to all things M&B.
Then expect to get trashed for a while. This rationale is why we have the class system, universal bi-color banners in SP, no player banners in MP, skirmish instead of battle, and the new AI order menu, among other things. It is not reasonable for someone to expect to perform well doing something they have no experience with, and tailoring systems to these inexperienced people necessitates simplification to make them accessible. This comes at the cost of depth, customization, utility, and/or fine control which experienced users use & enjoy.
M&B does not have many transferrable mechanical skills with other games, it's not like going from Call of Duty to Battlefield where the basic mechanics are the same. This, by contrast, is a niche game that requires players to develop new skills to succeed. New players that want to succeed should practice these skills, not demand with their limited experience that the game be changed to accommodate their choice to not learn/improve and thereby devalue the game for everyone.