If you feel "off" about a loss, watch the replay from the opponent's perspective with Fog of War turned off (Control + F in replay mode).
The community has expressed frustration regarding the prevalence of cheats and the perceived lack of a robust, automated anti-cheat system in CoH3 :
Command & Conquer: Heroes 3, or more accurately, Command & Conquer: Renegade and its relation to the Heroes series might cause confusion. The actual "Heroes" series from EA is primarily known for Command & Conquer: Tiberian Dawn, Command & Conquer: Red Storm, and expansions, rather than a directly titled "Heroes 3". That said, there seems to be some confusion or mix-up here.