I think we all knew that the first minority president or the first female president or the first non Christian president was going to be fought tooth-and-nail, and whatever they passed would probably be wiped out by the next president. And that’s exactly what we saw and are seeing.
But, this is a good thing. We now know that we can have a minority president. We’ll probably have a female present at some point. We’ll probably have a non-Christian president at some point. And those that follow will implement some of the things that the “first” ones did.
For example, the ACA will probably eventually lead us to single payer (but we have to spend 20-30 years arguing about it first). And those opposed to all of those “first” people have to throw tantrums and get revenge for a while. It’s just the way it works.