Useless unique artillery?

Anyone one else noticed how almost all unique artillery units are underperforming or straight up dogshit? The only good or decent unique artillery I can think of are Abus guns and light cannons and light cannons are only age IV so meh. Leathercannons are situationally useful in late second age but it's so niche. I have literally never seen a pro player use any unique artillery other than the Abus gun in a serious match.