1. Internationally there is currently no alternative to the US as a superpower and Trump is the leader of the US.
2. Domestically he continues to have a substantial constituency. Some of his polices actually poll better than he does.
3. The potential replacement cannot merely "resist"; they have to actually get elected and that requires having a vision that the electorate endorses.
And I would add:
4. Most (or let's say enough) Americans don't feel they are losing as you put it.
I believe you when you say you would like to apply the banhammer liberally (haha!) but so you know I come to HN for tech news. Looking at my comment history I do have a lot of political ones but it is in the hopes that I have contributed something to the conversation. Of course whether I succeeded is for the readers to decide.