Box defenses are more used and competetive in top divisions. Not because of tactic itself, but because of what kind of players people have to stay afloat there. Perimeter guys with ID and Bigs with OD are almost required. Of course it's still usable at the bottom leagues against inferior foes or teams with one dominant scorer. In your game maybe 3-2 zone would have faired better.
Here is a video from EBW's YouTube channel that talks about tanking
Know him, already watched all of his videos before
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All-in aficionado. Professional tanker. Trophy collector. Played box defenses before it was cool.