Some Calibration done.
60m/s
180 Deg PLA
6mm retraction
355 Esteps
0.95 extrusion multiplier.
First photo is the bottom.
Second and third are sides
Last is the top layer.
Any advice to make it better?
You’ll notice that the seam (where Z lifts for the next layer is pulled upwards.
I suggest you try calibrate filament extrusion like i did in this video and then reprint the 100% infill cube and compare the results. https://www.youtube.com/watch?v=7ls3B97IHyg
6mm retraction? Seems very high. Is that a .1 layer height?
I would try slowing down a little, add more cooling and incease wall thickness. Do you have the same problem if you print hollow or with low infill.?