As Terran
Make:
Marine
Siege Tank
MedivacMarine count and tank fire punish Marauders that overcommit.
Open in the counter tool with Marauder tagged ->As Protoss
Make:
Zealot
Immortal
DisruptorZealots absorb while Immortals and splash handle the armored core.
Open in the counter tool with Marauder tagged ->As Zerg
Make:
Zergling
Baneling
LurkerDo not let Marauders kite forever. Surround or zone them.
Open in the counter tool with Marauder tagged ->
Reaper
Hellion
Hellbat
Widow Mine
Cyclone
Thor
Viking