Bizarre font rendering issue in LO 5.4.0 under Deepin 15.4

Running LibreOffice 5.4.0 in Deepin (Debian based), there is a bizarre font rendering issue. It is most pronounced in the font Liberation Serif, but all fonts are affected to some degree. Some look even worse, others look almost fine. Take a look at this screenshot to see for yourself: It seems like antialiasing or something isn’t working right, because remember how Times New Roman used to look under Windows XP? Yeah, this is kind of like that. Yes, I’ve checked all the settings, played with every possible combination under the View category, including OpenGL. I have a modern PC with a good GPU, and this is the only font rendering issue I am seeing throughout my whole system.

Here’s a link to the screenshot:

Any suggestions?? Please help! Let me know if you need any info!

I love free software, but it does waste a lot of time. Maybe I should just go back to Windows and get illegal downloads of all the proprietary software. It would save me so much time.

(edit: activated screenshot)