You can't. You have to either rush to impose map control, or roll the dice and hope for the best. Chimera is the worst faction imo unless the enemy let you alone, then you can be very annoying with tigres and termies. But Chimera early is a nightmare, because of what I already told somewhere : you cannot use alu for defense and oil for attack anymore, you have to either choose between making pumas or lost all your money in turrets. While USA can easily protect a ref with a 800$ bunker, 1000$ for Cartel
I like chimera, has very nice units. Rhino is cool, buratino, Tigres, Terminator
But many players just rush rush and rush.
Exactly as you said, when they let you alone for some time is much better game.
Cartel and usa, they can just make defense with soldiers and spam income buildings and they will destroy you in late game.
With cartel ? no problem, don't need even upgrade. Build barracks near each refinery, mass soldiers for protection with one turret.
Chimera ? cant even build barracks without outpost :S so you spend gold for outposts which are useless in spear protocol without repairing.
u built outposts but you have no gold for tanks, and usa will come with cheap humwees and soldiers and you have outposts outside the base, but your base nothing there.
Few snipers turret ? 20 javelins will wipe them out in few seconds