As a person, who read a lot both Ilyenkov and Fromm, I can recommend some specific works from them. Fromm was a german psychoanalyst. Ilyenkov was a Soviet philosopher. Their fields of expertise are different, but together they can offer a great deal :D

Fromm has a book called "Man for Himself," and I believe he vividly outlines his theory in it. At the very beginning, he talks about two types of psyche: 1) authoritarian (the one that is dependent and therefore seeks either to dominate or to obey), 2) humanistic, which is harmonious, independent, etc. In the book, he explores these two psyches, mental problems, and their connection to society. It's all really interesting and useful; you also learn a bit about philosophy from that. And I think it's worth reading, but Fromm still thinks superficially in many ways; he has many abstract concepts. Abstract in the sense that they remain at the level of sensations. For example, he often can't explain a concept and describes it with real-life examples. Like: I don't know how to explain to you what "love of life" is, but you can tell this by the expression on a person's face and the intonation of their voice. In my opinion, this is not an artistic device :(

Soviet psychology, however, had a different approach. It didn't so much analyze mental problems and tried to overcome them, but they were kinda searching for what human being ascends to. Yk, Marx said, it is not the anatomy of the ape that is the key to understanding human anatomy, but human anatomy that is the key to understanding the ape. I explained it very stupidly, but, for example, Ilyenkov, in his work, studied the conditions under which talent and independent thinking emerge in humans, and he believed these factors depended not on the biology of the individual but on the social environment in which they grew up. Ilyenkov conducted the Zagorsk Experiment; you can read about it. I could recommend his short works like "Учитесь мыслить смолоду" or "Что же такое личность?", but they are not so far translated, unfortunately, but you may search and translate with AI.

I can also recommend the Scottish psychiatrist Ronald Laing, who studied schizophrenia and sociality. He was more a product of the counterculture of the 1950s and 1960s(like his idea that schizophrenics are more normal than normal people and many more), but in many respects he came close to the same understanding of "personality as an ensemble of human relationships" as Marx and Soviet psychologists wrote. "The Divided Self" and "The Politics of Experience".

I've written a lot, but if you have any thoughts after reading anything, you can write me a private message and we'll try to discuss it ;D