Instead of splitting hair ends... just accept the win/defeat graciously if offered.
Any negativity from either side should be brushed off
Should have/could have dont matter at this stage.
Whats done is done, its no ones moral obligation to improve each others gameplay/tactics.
People have a right to learn from their own mistakes, should not be criticised if they did not do as someone else expected them to.
Gracefully winning and gracefully losing is what needs to be done at this stage.
If you didnt like the opposition no one held a knife to anyones throat and forced them to play. If you didnt like the opposition u could have left the game as many had done.
This is for both/all sides not for anyone in particular.