"Who can imagine that a country would allow its own capital to be attacked and provide no response to such a situation?" France's far-left leader Jean-Luc Melenchon asked rhetorically, in what appeared to be a reference to Ukrainian drone strikes on Moscow.
If you want to claim no left wing states exist or have ever existed then fair enough, but generally things are compared to others. The USSR (especially the early years) was more egalitarian than the USA and so was more left wing, despite being authoritarian.
That’s a very strange way of looking at it. If there’s a far-right person and someone is comparably moderate, that doesn’t mean they’re “more left wing”. That could easily mean they’re just right-wing.
If someone is not stealing from their own country at the rate of Putin for example, that says little to nothing about the politics, human rights and equality in that country. The richest or specifically the ruling class in an African country may be worse off than those in the US or Russia, but that does not speak to the nature of either regime or make either more left-wing.