She is portrayed quite well in the recent National Geographic series about Einstein's life, "Genius".
Well worth watching. Mileva was a talented physicist and mathematician, contributed significantly to Einstein's early success, gave him three children and Albert dumped her for his cousin.
Like many people, they had a relationship that became bad and they divorced. He is reported to have had numerous extramarital affairs, also. This article is 24 years old https://www.nytimes.com/1996/11/06/arts/dark-side-of-einstei... - all of this is well-known.
He supported Mileva and the children from that marriage throughout his life. Everybody has flaws.
Well worth watching. Mileva was a talented physicist and mathematician, contributed significantly to Einstein's early success, gave him three children and Albert dumped her for his cousin.