Hey,
I can think of two ways of addressing this. Instead of uninstalling OpenType and TrueType fonts, you can have them installed in your machine and specify MATLAB to use TrueType fonts. This will change the Font of the whole MATLAB View. You can refer this link for more info on changing fonts.
Other way could be to just change the Font Properties of the Chart, so that it uses TrueType fonts. Refer to the following link on how to do so