Fairly certain if a monster had something like Spore Cloud, it would be considered OP by the hunters here as well. Try fighting a monster whose health you have no idea about along with your teammate’s health disappearing.
This is kind of the issue. If an ability is going to be frustrating for one team it needs to, in general, have a high cooldown AND be EXTREMELY satisfying for the team using it. This is often thrown around by Riot as “anti-fun” or something like that.
Now most weapons or abilities are going to be “anti-fun” to the person they are being used on, what truly makes it anti-fun is when the frustration caused by these weapons/abilities is far greater than the satisfaction gained from using them.
Often stated is the “mana leech”. It makes your opponent unable to fight back. It’s extremely frustrating to lose your only ability to fight back. Meanwhile the other person is just kind of using the mana leech. It doesn’t provide the satisfaction of a kill nor is seeing someone’s ability to fight just slowly draining THAT exciting.
Same goes for spore cloud. I’ve never heard a Slim go “OH YEA! GOOD SPORE CLOUD, THAT’S AWESOME!”, in fact most Slim’s claim it feels unimpactful.
But go be monster. You’ll see it becomes the most frustrating thing ever in fights and you HATE the Slim player.
The amount of fun being generated by it is nearly 0 but the frustration is extremely high. It’s poorly designed imo.
Contrast that with Hank’s Orbital Barrage. That might be frustrating to be caught in as monster but it generates a lot of excitement for the hunter team “LOOK AT HIS HEALTH MELT!!!” and it’s on a decent cooldown so it can’t happen consistently to the monster.
That’s a good ability design.