I am from EU, leftist, socialist and liberal (the left parts), and I can assure you, (a) most leftists (90%) are as liberal and antiauthoritarian as it gets, and (b) we are as powerless to change these things as you are.

Possibly, if you choose to believe me, things can change, but it's on you.

Liberal doesn't mean supporting liberty, it means some interpolation between supporting free markets (neoliberal means just this one), and pretending that as long as we just follow the established institutional norms everything is fine and there is no need for radical change. It's synonymous right now for "centrist" - note that political labels drift over time.

Liberalism has both economic (free market) roots and political roots. The first "leftists" were the French revolutionaries and they wanted (political) freedom as well. The reason liberalism is in the "center" is because both left and right tried to appropriate it. (Although I think liberalism, in the sense of individual freedom, is a distinct value from other values such as conservative/authoritarian or socialist/communal.)

Individual freedom absolutism is best refered to as "libertarianism" right now. Which, btw, is a label the right appropriated and the left gave up.

This terminology change is mostly limited to anglosphere. Outside of that 'liberal' is still commonly used for economic-right low-intervention position.

Let's judge them by their actions and then we'll decide.

Depends on country. Here in Czechia, Communist party is one of most socially conservative one, while conservative christian party is center-left economically. Social democratic party, when it was relevant, was also pretty socially conservative, which makes sense considering their working class demigraphics.

It's weird how you say that those terms are meaningless, then redefine them to fit your specific needs

In the EU the leftists have no significant powers so not sure why we even talk about them here. The EU right now is ran by mostly centrists and right-wingers.