I personally think communism especially Marxism sounds really good on paper. The problem is that just about every time it has been attempted things didn’t really seem to work like they are supposed to.
Boy, that's the understatement of the century. Not only did it not work, it often results in mass murder and the ushering in of a totalitarian regime.
What we have today isn't really even capitalism anymore. It is becoming something else. We don't have free markets, for example, because large corporate players are not allowed to fail. Under a central banking system, the state can simply print money to fund its corporate protectorates while artificially suppressing interest rates to avoid paying any interest on the debt. And then we use tariffs and policy to pick and choose winners, suppressing competition. This is about as far from capitalism as one can imagine.