I don't know much about depression but I do know how people react to it if someone close to them have it. Florian Zeller may not have presented how accurate acute depression is but his depiction of characters around a person suffering from it is near perfect.
The Son works for me more than The Father because it relies very little on subtext and the story is out there in the open. Hugh Jackman gives his career best performance as a role of a successful person but an absent father. There are criticisms of how the movie does not empathize with Nicholos but I didn't feel it that way. I felt it was rather accurate because of how less most of us understand what depression is actually is. Most of the times, people think "it's just in your head" or "move forward" are actual solutions to depression.
The scene where Hugh Jackman fights with his son was spectacular and shows us how much we are like our dads. Hopkins appears in just one scene but that single scene shows the irony of Jackman's character. The ending was absolutely devastating and very brave. The Son is one of the very films which worked very well for me despite it's not so favourable general public reception.