I keep winning as the guardsmen

Every time I play the guards men I win no matter what.Are there any counters to this faction?They feel so unbalanced because of their ability to make bastions and their overwhelming range advantages not to mention they are one of the most numerous factions with cheap and easy units (image provided for reference)

Every time I play the guards men I win no matter what.Are there any counters to this faction?They feel so unbalanced because of their ability to make bastions and their overwhelming range advantages not to mention they are one of the most numerous factions with cheap and easy units (image provided for reference)