This issue came out of nowhere several days after my installation of Deepin. It is present in every single software I use, from browsers to text editors. I tried updating the system after the issue and the situation did not improve. Another weird thing I noticed is that the mouse moves slower on areas containing these monospaced fonts. This problem happened to me before on Kubuntu in a past installation on the same machine. I have an nVidia GPU and the proprietary drivers are installed and are working properly (tested no screen tearing, etc.)
What could be the issue? Any terminal commands to look for?