The article has not a very good vibe to it, tbh.
Viktor has a very objective tone of voice. He never paints himself as a saint, a martyr or a superman. This creates a certain feeling of detachment that shields from the full emotional impact of what he actually went through.
Overall, however, the book is about survival and the strength of human spirit. Especially since Mr. Frankl personally went through hell, retained his sanity and will to live, and wrote the book.
It's a book that gave me hope and strength in dark times.
It is a very persuasive argument about how one can deal with even the most 'hopeless' situation.
It is also a brilliant description of the psychological effects of camp life.
The way he described the odd dislocated feeling they got when the allies set them free was particularly memorable for me.
The book focused on things which I found to be subtly more disturbing, like the ability of an overweight Nazi guard to curse a death camp prisoner for being "swine, who doesn't know how to work!" while the prisoner is literally working themselves to death in front of the guard to just stands around being fat and worthless. Does the guard not see the irony? How is it possible that he does not? Do I myself hold any absurd views like that Nazi guard?
Ultimately the book showed me that there are decent and indecent people in any group, and made me want to be a decent person. I wouldn't say the book is depressing.
Also his book are secretly 2 books for which this part is the first part. The second part is about Logotherapy, something he developed after WWII based on the insights he gained from people in concentration camps.