To expose the logic and reason failures of Einsteins theories, I discuss the subject with Googles AI Chatbot, and ask it to explain the theories from the text books and modern literature. What do you think happened? Can you defend the theories or are they failures? You will be surprised how weak the claims of Relativity are when really critically examined. But maybe you are smarter?
There is no such thing as a four dimensional "spacetime". That is a abstract math only concept, nothing to do with reality. Time is not a thing, nor is it a dimension. Reality is not curved or flat. That is abstract geometry that they are talking about, not reality. Only 3 abstract dimensions are required to locate anything in reality. Time is just when you want to examine these three dimensions.