I know that many people resonate with what Gabor Mate has written about ADHD. If you find something good and useful in it for you, great, go with it.
But the books I have read by him seem to focus far too much on blaming the mother and a history of childhood trauma. Yet many, many individuals with robust ADHD lack a history of trauma in their background. The adoption and twin studies very strongly support a genetic component, separate from the presence or absence of early childhood trauma or mismatching between the needs of the child and the ability of the mother to be nurturing. Much of what Mate has written sounds to me like a repetition of 1950's and 1960's era of blaming mothers for mental health problems in their kids. Which is actually somewhat strange in that Dr. Mate's training was as a general practitioner, not a psychiatrist.