IMO, you didn’t get unlucky with the K1M or lucky with the P1S. That’s the normal state of printers. Most printers are hard to dial in well, and the Bambu printers work like a dream out of the box. Luck is involved for anyone that didn’t start in those states.
People have been trying to make Blender have some basic CAD functionality, but it’s just not there yet.
I admit I haven’t tried https://www.cadsketcher.com/ with it yet, though.