>>54445841No
>>54445800 is right, a counter is something that can directly switch into a pokemon and still win 1v1 in the worst case scenario. That being said you're forgetting a few things.
1. Vileplume is essentially a dead pokemon versus gholdengo.
This is a huge and really big problem for it, especially when Gholdengo roams wild in the tier.
2. Vileplume will take a hit and literally die according to your calcs, and the best it can get off is maybe a sleep powder. Amoongus is literally 20 times better in this scenario.
3. You listed Ursaluna, Urshifu, Sneasler, Kingambit, and Great Tusk in your calcs.
Urshifu is banned.
Great Tusk is more an offensive utility pokemon and multiple other pokemon answer it well.
Ursaluna, Sneasler, and Kingambit are mostly settup sweepers, if they Swords Dance and you strength sap vileplume is dead. If you sleep power you're basically budget amoongus that might miss.
Vileplume is just outclassed by amoongus and therefore won't see play.