My brush strokes & brushes in Affinity Designer/Photo always have ragged/pixelated/AA-artifacts no matter the resolution of the document.
I have made sure I am using the Brush tool and not the pixel brush tool. The same problem consists whether I toggle Windows Ink on/off in either the Wacom settings or Photo/Designer settings.
RTX-2080Ti / Wacom Intuous PTH Tablest / Windows 10
@swobyman777 @Sean PI can explain what's going on here. It's something I noticed years ago when picking up Affinity Photo. It's all related to brush hardness. Compared to Photoshop, Affinity has much sharper brushes with next to no anti-aliasing when reaching 100%. However, you can get the brushes to look a bit more like regular Photoshop brushes by changing brush hardness to 99%. It produces a slight blur on super massive brushes, but nothing that would be super noticeable in most projects. In