Don't blame the map just cause you can't counter 88s. The map has more than five shotblocking forests in the middle, a number of buildings and many hedges. If that's not enough for you to place a mortar or flank around, then get a howizer. Generally, any map can become too open if you let them enemy crush all the hedges and set up in the middle, then you've already made several tactical mistakes.
Wise words of the wise man.