Can someone please explain how neutrality affects sovereignty? Last time I checked Switzerland was a neutral country with absolute democracy.
I think you are conflating issues.
Democracy and sovereignty aren’t the same thing, and in the case of Ukraine both are being threatened. Democracy is being threatened because someone is trying to overthrow their elected leader. Sovereignty is being threatened because that “someone” is actually another country. Neither of these things relate to neutrality.
In the case of Switzerland, the people repeatedly vote for governments who maintain neutrality. Their vote and government decisions are respected so they maintain both democracy and sovereignty. Ukrainian people voted for a government which promised closer ties to the EU. Russia want to overrule the vote and government to enforce neutrality so both democracy and sovereignty are threatened.