[Question] Is there a world where not running a mega is viable?

In champions I want to use a team of: Politoed, Goodra, Archaludon, Hydrapple, Hatterene and Incineroar. I dont have enough vgc experience to know if its worth replacing something here for a mega because I know how good they are.

Im thinking mega gardevoir instead of hatterene although that would make it harder to have a secondary trick room mode or mega dragonite but I wouldnt want to replace goodra because its my favourite pokemon (I know its a bad mon but that's the one thing im not changing)

Idk if this would get removed because im assuming theres already been similar things asked but would there be a chance where the team itself could work without a mega (Ive always enjoyed rain teams and this is the first team ive made myself that im really happy with but if anything should be changed I think its worth doing)