If you set aside some of the jabs, what you really have here is a non-controversial classic case of boomers vs. rushers. In strategy games, boomers are the players that need 40 minutes of unmolested build time to slowly put together a powerhouse civilization that can roll people in the late game. They're the kind of guys that say "no attack for 10 mins, k?" when the game starts. Rushers are the guys that go balls out and finish the game in 10 minutes by spamming early units and battering the other players who are still building granaries and baking pies. They're the type that say "gg no re" while you scream at your monitor.

In CF terms, Marcus is the prototypical rusher type, and someone like Lightmage would be a typical boomer player type. You see these kind of debates on strategy forums all the time, where some frustrated boomers are slamming rushers for boring, "easy" playstyle and vice versa, but really it's not controversial at all, and just a sign of a nice complex game where both styles can succeed at all stages if they adapt well enough.