I was watching a video on the the family trees of Ancient Egyptian dynasties and I had this moment of confusion when I was trying to figure out the lifespans of a couple of the pharaohs in relation to each other. The numbers didn't make sense until I was like "DUH!" its all BCE so the years are all running backwards! It got me wondering though if there are alternative systems for keeping track of those years that would be easier to read and understand because they go in the "right direction"? Could you keep CE 2020-0 as it is, still use BCE 0-50,000+ for things largely beyond the scope of recorded/discovered history, but create a section of dates called say KHE (Known Historical Era) that runs from 8000-0 covering what is currently BCE 0-8000? The idea being that the number of the years would increase rather than decrease as time moves forward in that period. What would be the pros and cons of a system like this beyond just the fact it would obviously be different than what is every historical text out there.
There a few different calendars that try to address this but none ar considered an academic standard. The one that come closest to your meaning is likely the Holocene Calendar. It begins roughly with the start of the oldest settlements in Turkey specifically focused on early mega structures. It is a culturally derived system that out us at the year 12020. It has a year once and it makes some sense over all. Still while an academic came up with the idea it does not mean the calendar is widely accepted.
Besides, we should be sceptical of the calendars that are proposed. Tools for placing things in history are often heavily biased about something. Some point is usually the obvious sticking point. The shift from BC and AD should give you some idea about what kinds of things are at stake. As well, most officially sanctioned calendars have only been there to mark seasons and religious events. It's only been since relatively recently in human history that we have even asked for a neutral calendar that just keeps track of time.