Firstly I don't agree with the guy you answered in terms of socialism. Socialism does not say anything about the political system. Socialism is about economics and welfare.
So you can have authoritarian governments that are socialist, or libertarian ones (in fact, libertarianism on the left predates right wing libertarianism by a century).
Marx spent one of the four chapters of the Communist Manifesto criticising alternative socialist ideologies, including reactionary, feudalist socialist ideologies. Marx himself was later condemned by people like Bukharin for being too authoritarian, leading to a split in the First International, where the most liberal socialists and anarchists left. Despite that there was shortly afterwards a resurgence in libertarian Marxism.
This difference grew greater leading up towards the Russian revolution. Lenin e.g. wrote the book "Left Communism: An Infantile Disorder" criticising the left-wing of his own party for its anti-authoritiarian views.
Consider that the "Russian revolution" came in two parts: The February revolutions where the Czar was overthrown, and a liberal socialist government under SR was put into place, and the coup that became known as the October Revolution, where the Bolsheviks decided to not honour the elections to the Constituent Assembly - an election that gave them ~10%, with a solid majority going to the liberal socialist SR, Left SR and Mensheviks.
After the coup, parts of the liberal socialists and communists tried cooperating with the Bolsheviks, parts joined the White's in the civil war opposing the Bolsheviks, and over the coming years tens of thousands of socialists and communists on both sides were murdered while opposing the Bolshevik rule. The purges continued for well over a decade (culminating in the Moscow Processes, where Stalin put on show trials to justify executing tens of thousands of Bolsheviks that had until then still fought against the rising authoritarianism).
In other words: Lookin for the label "socialism" to determine whether someone is left or right or liberal or authoritarian doesn't work.
> No, I do not buy it that in Socialism the government is subordinated to the individual, my family actually lived in such a shit system and I've seen it as a child myself.
And you are making the flawed assumption that a name only describes a single system. By thinking North Korea is democratic, because it's name is Democratic Peoples Republic of Korea. Clearly they are not democratic.
As mentioned above, socialism is not a single political system, but a set of characteristics that can apply to political systems across the spectrum.
> Edit: And last but not least: Hitler himself frequently said and wrote that he is a Socialist.
The NSDAP adopted the term because it was popular with the German working class. It was predominantly a populist move, the same way that the staunch monarchist and conservative Bismarck, when labelled a "state socialist" by his opponents for his welfare reforms adopted the name and turned it to an advantage.
Early on the party was a curious mix of left and right wing, that is true, mainly tied together by nationalism, and a variety of policies appealing to a mix of groups.
When Hitlers influence in the party rose, he quickly and brutally changed direction of the party, and pushed out the more left wing parts of the party in order to satisfy increasingly financially important right wing backers, and after he got power he went as far as having the leaders of the remnant of the "left" of the NSDAP murdered and arrested.
If you are going to be discussing the NSDAP, you need to be careful about which time period you consider, as the party that gained power in '33 had little in common with the party in its early days.
> Not an International Socialist
The Bolsheviks too gave up any pretense of being "international socialists" under Stalin, with the passing of the Socialism in One Country doctrine as official policy in '25. They tried to "export" their policies primarily as a matter of self preservation. In fact, the term "international socialism" from then on primarily became associated with Trotskyism (there are e.g. Trotskyist groups using that name).