Coming from a BFME 1 background, I can see harassing isn't your strong point. Once you can master it, you'll be in good form. I haven't watched this replay, but seeing that you didn't harass much in this game (according to those who did watch the replay), I'll say this: it's imperative that you be more aggressive towards spam factions' RBs and PBs as ridding them of their spam units isn't detrimental to their economy.
I know this. And tbh this was one of my worst games when it comes about harassing. I posted it because of the strategy point where I was clueless as well. And your tips already helped me to win this MU now