Just something MAGA-people seem to have a hard time with sometimes. Probably not as much when Americans are speaking to themselves, but as a non-American, sometimes it’s challenging to get “those people” to admit that there is indeed anything wrong with the US. As in they won’t accept a single criticism, and will loudly proclaim “America is the greatest country in the world”, while wearing a “Make America Great Again” hat, which for me pretty explicitly means America isn’t great, if it has to be made to be such again.
You bring up a valid point. There are many facets of life and a left/right divide, and some of them did shift left.
But compared to the 50s (which is when many right wingers idolize), particularly starting with Reagan, we’ve seen:
Push for theocracy
The war on drugs
Less “society” and more individualism. This is especially true regarding regulation of harmful activities for profit, such as corporate pollution
Reduced enforcement of those laws that we do have, as long as it’s a corporate entity and/or for profit
Massive consolidation of all industries. Competition is now mostly an illusion.
Strong push against workers’ rights. Reduction in union protections, minimum wage laws, OSHA powers, etc
Active, planned takeover of media. This was started by (IIRC) Roger Ailes that if the right controlled the media, Nixon would not have been impeached. He went on to found Fox News with that philosophy, and proved it correct with Trump. See also: Sinclair
While this mostly happened at a state/local level, it has been nationwide. Government was intentionally ruined as an effective organization, and now provides way fewer/worse services
These are just a few ways that the country has shifted right, but they are so impactful to the average person’s daily life.