[Saulot]

1 hp wouldn't count as a wound on anything except for some insects or animals. It needs to have 80% of it's hitpoints or less. Humans tend to have 10 or more.

If multiple successful repels are occuring on your troops, and that is enough to route your army, then the problem is most likely caused by there being a significant gap in the quality of your troops and the enemy troops.

Overall, I have to agree with Sombre on this one, repel isn't a major consideration when picking troops, and perhaps it should be made somewhat stronger.

The most thematic suggestion I could make is that repel has a bonus vs. mounted units and vs. trampling. Then at least it would be situationally useful. Furthermore, while I'm aware that 0 length weapons are easier to repel, I think that aspect should be expanded, so the overall difference in length is used, so for example a pike repelling a dagger is significantly more likely than a pike repelling a spear.