I still think Einstein was correct in his first conclusion but he let the cosmological society overrule his intuitive perception.
Quote from -
Cosmological constant - Wikipedia
“Einstein originally introduced the concept in 1917 to counterbalance the effects of gravity and achieve a static universe, a notion which was the accepted view at the time. Einstein abandoned the concept in 1931 after Hubble's discovery of the expanding universe. From the 1930s until the late 1990s, most physicists assumed the cosmological constant to be equal to zero. That changed with the surprising discovery in 1998 that the expansion of the universe is accelerating, implying the possibility of a positive nonzero value for the cosmological constant”.
That is: "Once upon a time" the Universe was thought to be static and the cosmological constant to be zero. Along came the Hubble telescope observations and the idea of measuring "redshift distances" via luminosity of stars and via the frequensies of specific elements.
The very idea that the expansion of the Universe is accelerating is in itself an unexplainable and speculative issue and of course this lead to another dark cosmological idea of "dark energy".
Furthermore is the "redshift measurement" strongly criticized by astronomer Halton Arp who discovered that a certain galaxy and a significant star in this galaxy are measured to have very different redshift properties as described here -
https://www.haltonarp.com/articles/intrinsic_redshifts_in_quasars_and_galaxies.pdf - hence the redshift method cannot be taken as a valid method to measure astronomical distances and expansions, which again discards the very idea of an accelerating expanding Universe.
Once upon a time the cosmological constant was thought to be zero but all kinds of theoretical ideas are speculatively invented and taken into account for the very strange idea of Big Bang and an accelerating expansion of the Universe.
IMO Einsteins biggest blunder was to accept a Big Bang creation from nothing and its "accelerating universe" and discard the "static" perception of the Universe. And this universal blunder mostly STILL rules the standing cosmological perception.