well it looks like you have what's called "ringing" which is where you see the outline of the part reflected further down the surface. A lot of times this is down to the stepper motor acceleration and jerk settings in the firmware or just vibrations from the design of the printer. You might not be able to do much about that given the printer design and the fact that the firmware is likely pretty well tuned (maybe? maybe someone has a better updated firmware you can swap to?)
You can try lowering your print speed for parameters. generally that will help solve minor defects like that.
as for the issues in the corners, this might be helped with lower parameter print speed, or adjusting your extrusion multiplier. I usually run between 98% and 100% on the multiplier (or 0.98 and 1.00 depending on how it's set in cura) a lower multiplier will give less visible layer lines on the parameter, but go too low and you'll end up with less overlap between the print lines which will cause your part to become more brittle.
definitely something where you'll have to find a happy medium.
if you have some calipers measure your filament and make sure it's actually 1.75mm if it's slightly thicker or slightly thinner that will throw off the multiplier.