If you're playing CoH for the SP, you're playing it for the wrong reasons. Period.
Perhaps...I unfortunately do not have enough time in the day to dedicate for multiplayer matches.
That, and I don't have the time to understand the balancing, advantages and disadvantages of different unit types...or explore strategies on how to effectively counter a human opponent, not to mention mastering the different maps, etc.
I would love to play multiplayer...just afraid I will login into a match, and get wiped out in 5 mins or less by someone who has already mastered a strategy for their map of choice, has their hot keys wired to move quickly, and has heavy armor knocking on my door before I capture my first strategic point.