I would definitely NOT be happy with this benchy if it came off of my printer.
Thanks for posting a known model. This new information really leads to a filament that is out of calibration. Moisture is a possibility even though it’s PLA. Drying your filament can’t hurt so consider that as a first step in troubleshooting before you go any further. Or you can simply try another filament just to see if you can reproduce the problem.
Based on the line in the middle, it’s clear that you’re experiencing filament shrinkage at the deck line. This is caused by the filament behind the wall having more mass so you’re getting shrinkage which is causing the outer wall to shrink at a different rate than the other walls that are thinner.
Now, you could easily go into your slicer settings and change the wall thickness or switch the wall sequence from the default inner/outer to outer/inner, but that doesn’t address the fundamental issue, which is a filament problem.
You shouldn’t accept anything less than this quality.
Note the smooth hull lines. The model on the left is PLA-CF at 0.28, and the one on the right is PLA at 0.08. I would consider the one on the right an inferior print due to the stringiness I haven’t yet calibrated out, but at least the hull is respectable. Note that there are barely visible hull lines, and there is some ringing in the filament flow on the right side. This may seem picky, but the results on the left are what we’re striving for, and as you can see, yours isn’t even close. I’m not saying this to make you feel bad—it’s just that you need to know what success looks like in order to reproduce it.
