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I would think that the Wolfram Settings >> Interface >> Global Magnification setting could correct your issue, but perhaps you have tried that and it didn't help.
It was to be expected that new 13.0 version does not resolve the old and well-known magic issue with resolution and DPI. I have 15'' laptop with full-HD screen (1920*1080). In version 12.3 it was an issue with blur in all the notebook elements...