The ordinary left (and right) leaning people don“t call themselves right or left.
The selfproclaiming left in western society are moralizer and I am yet to find a moralizer in any age and place that is not the issue in their society.
It is not my problem that the moralizers call themselves "the left" it is the lefts problem, same goes for christians a group stigmatized in the USA into absurdity for the same reason. And it will happen to "the left" as well because that is what society does to moralizers.