[raattgift]

> almost nothing of interest

> terrible record

> might have produced more

You do not seem to have much knowledge of his publication record.

Here is a list of 272 journal articles by Einstein and coauthors, the majority of which would certainly be considered peer reviewed by modern standards.

https://en.wikipedia.org/wiki/List_of_scientific_publication...

From just these papers, among the things you put into the bucket of "not huge breakthroughs" were (in small length scales) Bose-Einstein statistics and Bose-Einstein condensates (notably his 1924 and 1925 papers), his atomic emission and absorption theory (the "stimulated emission" in laSEr), and his paper with Podolsky & Rosen and (in large length scales) General Relativity, Einstein gravitational lensing, the Friedmann-Einstein and Einstein-de Sitter expanding universe cosmological models.