Anaguma

I tought anaguma was invunerable against a frontal atack.
Is it bad against 3rd file rook or do i have to channgge my basic rules for openings.

lishogi.org/5xYrKI51/gote#45

1. the positions of your silver and gold are swapped. in a correct anaguma the silver will be covering the gold instead
2. don't ignore threats like the pawn coming into contact at move 21. it promoted and gave you more trouble than if you had taken it instead
3. the order of pieces you use to defend could be better

Anaguma seems a opposition castle instead of a good castle choice for both static Rook nor both swinging Rook.

Its the other way arround its weak to frontal edge atk and strong vs side atk since theres a lot of generals and distance between the king and opposing rook

So the wikipedia article on anguma is false in the paragraph on how to atack anaguma?