Turns out that was it the AI threw in the towel at this point.
Artillery killed the Sherman so it might have been damaged.
GIF shows there were a lot of units left probably 2/3rds of the British Southern Force never saw combat, they had to cross fields & mud.
Not surprised really did say at the outset the map could be a problem.
Low visibility is also a major problem for the AI, it makes you work hard but you can scout sensibly & if desired bring overwhelming firepower as firefights happen in local pockets. The process of deciding what to do for a given situation is transparent but the brain must weigh up a lot of factors depending on what you want to achieve.
Enough factors that I had to ponder for a while on a the best course of action for some of the moves.