Voting third party is viable when we change the voting system, to ranked choice voting for example. Until that time comes, the two primary parties will remain dominant.
It's literally already happening. Locality by locality state by state at least take the time to look around you before you make any absolute statements. It's going to take forever at the national level absolutely. Far longer than I should. But it can and will happen.
No one owes anyone engagement. Especially someone like you. Who's showing themselves repeatedly to be disingenuous and bad faith. You don't have to like it. But there's nothing you can do about it. Outside of act like a better person.
Oh come on. They're a little overzealous about posting but it's a major stretch to call them disingenuous and bad faith simply for disagreeing with you.