As so often happens when there’s not a full core dump, this will become 20 questions as people try to guess at the missing info.
So, one such question would be: Have you tried increasing your first layer height? If there’s irregularity on the build plate, that would tend to compensate for it. A first layer height of 0.08mm will highlight a lot more imperfections than 0.2mm, for instance.
What about ruling out layer adhesion as a possible culprit? I can see how that might be an issue, regardless of how well you cleaned it. One thumbprint in the wrong place and all that work goes out the window. So, how to test this? Wear gloves and apply a strong layer adhesive. Your choice on that, but don’t choose Bambu’s (it’s meant as a bond breaker). Definitely overkill, but vision Miner is the strongest I know of. Yes, it shouldn’t be necessary, but to quote a certain actress, “It’s the only way to be sure.” Then you’ll know.