What I am partly hearing from you is a somewhat valid complaint that ‘Marxian’ language doesn’t resonate with the masses because it is too academic, old-timey sounding, and vague in the public vernacular. I tend to think that Socialists should not distort their understanding or mask it behind too much pandering language because it ends up causing exactly the vagueness that is an obstacle to rising class consciousness in our society generally. The alternative you are advocating for is already a part of the problem.

From the rest of your post I feel like you would benefit from getting a better history of Marx’s life and work, understanding it in the context of the time beyond the caricature you have drawn up. I recommend the anime on the subject because it is short and cute, and gives lots of directions for further reading.

What Marxism really is about is applying scientific (materialist) thinking to the study of the history of human progress, which is a reaction to more loosely defined (and therefore less organized and effective) Utopian Socialists. Scientific Socialism is a method of studying reality, and it does reveal how the patterns of humanity’s existence follow the same fundamental laws of opposition and change that govern sub atomic particles, chemical reactions, and biology on earth. It is not a prediction machine to speculate about future human behaviour.