You are wrong on what was right.
On GR and Einstein, he thought he was right and wanted to improve on it by including more forces in a synthesis.
On DESI, they failed to find Einstein's GR wrong which strengthens GR.
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Albert Einstein devoted much of his later life to developing a "theory of everything" because he sought a unified framework to describe all fundamental forces of nature. This quest stemmed from both his philosophical beliefs and hints from physics that his earlier theories, particularly general relativity, were incomplete. Here's why:
1. The Incompleteness of General Relativity
Incompatibility with Quantum Mechanics: General relativity describes gravity on large scales, such as stars, planets, and galaxies. However, it doesn't account for quantum phenomena, which govern the behavior of particles at very small scales. Einstein recognized the need to reconcile these two pillars of physics.
Singularities and Extremes: General relativity predicts singularities, such as those at the centers of black holes or at the Big Bang. These points of infinite density and curvature suggest the breakdown of the theory under extreme conditions.
2. The Missing Connection to Electromagnetism
Einstein's earlier success with special relativity included insights into the relationship between space, time, and electromagnetism. General relativity extended these ideas to gravity, but it left out a deeper integration of electromagnetic forces and other forces like the weak and strong nuclear forces (not fully understood in his time). Einstein hoped to find a unified field theory that combined all these forces into a single, cohesive framework."
As I said, Einstein himself knew he was wrong about something. Either he was just plain wrong, and it was just a good approximation most of the time, or he was missing something in his theory.