In my experience its very hard to maintain a line of pikes + push toward a human opponent that is in a kiting mood or excel in throwing stuff.
Holes will appear and acute angles will form after prolonged combat; individual flanks will open and enemy breakthrough will be possible locally.
One fix is having back-up to plug holes or slightly overlap your pikes but then it reduces the frontage advantage over hoplites.
Funnily enough, a good line of pikes will not 100% engage all units in front due to formation hiccups. Not a problem if its the enemy trying to bring the pain, but if not they can more easily disengage a couple paces and throw more stuff, or even retreat and replenish after a kind of skirmish-battle.
And yes I play head-to-head campaigns against devious people
Basically what KYREAPER said:

Originally Posted by
KYREAPER
But the key is, with Pikes, you MUST have a very balanced set of supporting units... or the pikes will fail and you will get kited and outranged, etc.
So against smart defensive opponent I much prefer hoplites if I dont know exactly what he's gonna do. I lost many battles trying to push a pike role-play too far
But then its very normal and realistic IMO.