Point of Order, in actual fact dictatorships are not necessarily bad, some of the best and greatest rulers in history (including modern history) were dictators. Most historians will tell you that the "best" and most capable governments in history were run by enlightened despots or benevolent dictators. Every single Monarch or Emperor who has held power is a dictator. Most nations founders were dictators and in many countries (including the US) leaders assume near dictatorial powers during times of crisis.
In Ancient History you have Emperor
Augustus and
Lucius Quinctius Cincinnatus of Rome,
Ashoka the Great of the Mauryan Dynasty in India, and
Cyrus II of Persia for a few examples.
moving forward there are a few notables who stand out including
Louis XIV (the Sun King) of France,
Elizabeth I of England ,
Catherine the Great of Russia,
Fredrick II of Prussia. ...
Getting a bit more modern you have
Mustafa Kemal Atatürk of Turkey after the 1st World War,
Tito of Yugoslavia,
Paul Kagame who took charge in Rwanda in the mid 90's after the Rwandan genocide.
If you want to look just at the United States FDR and Abraham Lincoln are generally regarded as the two greatest presidents in American history (a point I agree with), however they were also arguably the most powerful and dictatorial. Lincoln directly ordered the arrest and detention of dissenters, the suspension of the right to writs of habeas corpus and significantly curtailed the freedom of the press. FDR remained in office for 4 terms, in 1937 he attempted to pack the Supreme Court, During WW2 he ordered the internment of Japanese Americans and he also significantly curtailed the freedom of the press. The both exercised "War Powers" to greatly expand the power of the executive branch at the expense of the other branches.
The problem with dictatorships is not how they exercise power its how do you remove a "bad" dictator from power.
Your argument falls apart because it is based upon a faulty premise (multiple faulty premises actually)
You assume that the Xavier/Krakoa government is bad, why? Because it is a dictatorship. However, you haven't proven that Krakoan the government is a dictatorship, neither have you proven that dictatorships are bad. Both ends of your assumptions are faulty and incomplete.
Further, your assertion that this is a dictatorship is manifestly wrong. Krakoa is ruled by a council, how much power individual members have on the council has not been determined. If it has the power to check Xavier has not been proven or disproven. The fact is that there hasn't been an issue that we have been shown where he has been opposed by the council is not proof that they cannot or will not oppose them. That is yet another assumption without evidence. Lack of evidence is not evidence of lack, the fact that (only a few months in, a relatively short period of time) we haven't seen major pushback against Xavier does not mean that there won't be or can't be. The fact that Xavier has a great deal of influence over the rest of the council has 1) not been proven (we have no idea how much influence he has over almost half and 2) does not equal a dictatorship.