The balance of FAF 'stops' at maps of size 20x20, anything beyond that is not properly balanced. A well tailored 20x20 map barely sees artillery because it is not worth the investment (70K+) compared to other strategies.
Looking at a replay of yours - your play style is very turtle-like. This is not critique - you play the way you want. But as a consequence you are artificially extending the game. As an example, take this game:
At this point you have tech 3 extractors. You could've easily made bricks and an experimental to decimate the AIs long before any tech 3 artillery is even being built. But you don't - and as a consequence the game gets into a state that you wouldn't usually be in as a competitive player.
@maudlin27 noticed how a strat is hover bombing to take out a spider bot - impressive