Are you using Fusion360? If so, that looks a bit pronounced but fairly typical for 2d adaptive clearing. Adaptive clearing is primarily a roughing strategy and it should be followed by a finishing strategy like 2d contour. Make sure you leave a bit of stock in the adaptive so that you have enough to clean up. You can also adjust the tolerance and add smoothing to your contour operation. Here is a short article that explains smoothing.
https://www.nexgencam.com/hsm-tips-t...ing-tolerances