If your bluffs are very junky, they will rarely hit boards hard. So your premium hands need to carry most of the weight. Here's an example of a good board for an extremely polar range:

2 2 2

Why? Because you have all the big pairs, your opponent not, and he is left with worse pairs and a bunch of overcards that you now can barrel hard against.

A bad board for a junk-polar range would be:

J T 6 with a flush draw.

Why? Because it hits your opponent's 3B calling range very well, and if your bluffs are very raggedy (Axo type of stuff) they mostly miss. Compared to the 2 2 2 board, your overpairs are not nearly as strong. They are still usually the best hand on the flop, but your opponent will have much better equity on average when he calls a c-bet, and some of his likely 3B-call hands (JJ, TT, JTs) have you crushed.

The typical polarized 3betting range with hands like 54s, 74s, K2s and 98o to name a few hands performs best on low flops like T75, 964, 742 etc. Your bluffs connect with the flop,villain makes few pairs and you have many overpairs with a lot of equity.

It performs poorly on A high, K high and Q high flops because those flops miss your weak hands and connects very well with a tight call against 3bet range. The more cards T and above the better for villain and worse for you. Any board with two cards 9 or higher will be somewhat bad for your range compared to villains.