Fascists, Socialists, Marxists, AntiFa, BlackLivesMatter, the KKK, the Neo-NAZIs are all collectivist statists. They all believe in government as the Alpha and Omega. They are all Leftists.
Further, the entire 2-dimensional right-left spectrum is fraudulent, set up to give the false impression that the only choices are different forms of dictatorship. I recall a college class in which the professor presented us with a spectrum that had communism on one side and fascism on the other. Democracy and freedom was presented as in the middle of those.
Freedom is not a compromise between fascism and socialism. It is completely off of that spectrum. Freedom is the optimal human condition. We are born free. Everything else is a perversion, a sickness in a given society.
Again that focus only on the size of government and not what it endeavors to achieve.
If you don’t believe in a right versus left distinction, that it all comes down to government size, then Republicans who want to increase the size of the military or the power of law enforcement are just as left wing as Democrats who want to increase the size of Department of Education or the power of social workers.
It does not seem sensible to treat both as identical on the basis that both increase the size and scope of government; some way of distinguishing those reasons for increasing government would seem sensible.
If you are part of society then you are part of a collective. That collective will order itself some way. In so ordering itself it may leave you less free. However imperfect, the left/right distinction gives a way to describe what and how those limitations may apply.
There is a difference between government power that would proscribe homosexual relations but allow you run your business as you see fit and a government that did the opposite. Both are using government power, both infringe upon freedom, but both are not the same in quality. I think most people could guess which form would be called left and which right.
Both left and right governments will vary in how totalitarian (size) they are e.g., the (left) social democratic governments of Europe do not control or intrude everywhere; Conservative governments may impose restrictions on abortion but otherwise leave personal relations alone. The overall size and scope of government (and diminution of freedom) may be the same in both, but you would not consider them interchangeable.