What would you call the belief that the present is a bad time and the past is the example of how it should be? Not that the past was a perfect or even necessarily good age, but that the present is much worse.
Suppose that you were given the chance to go back to any given era. Some people would choose to do so because that era is the lesser of two evils. These people might be described as ____s, ____ist or ____ish, and their social trend might be described as ____ism.
Amish people might be a good example, but too specific to be a satisfactory answer. ____s might not all have rules they're socially expected to follow or live in communities of the like-minded. They might not even agree on which point in time in the past was better. In fact, there is no official ____ism movement. This word simply describes people who constantly grumble about this particular topic.
I found a related question, but it asks for an individual, and the most upvoted answer, "nostalgic," doesn't quite fit the bill. I think of nostalgia as fond remembrance rather than discontent with the present. However, if there is some way to qualify the word nostalgia so that it could be understood to mean a cynical view of the present as compared to the past, that might be acceptable.
Best Answer
There have been numerous "traditionalist" movements with the word meaning different thing at different times, making the word less helpful because of it's association with specific movements.
ALSO> I don't think the word works today because it sounds too "normal" and any word that has less than a clearly pejorative ring to it won't be acceptable to those that don't want to normalize dangerous ways of thinking.
... that being said, what you refer to is close to:
traditionalist, traditionalism
meriam-webster
Below is a discussion at Wikipedia of one period roughly categorized as Traditionalist Conservatism