This may be a boinc issue or a general issue. I have had difficulty getting boinc to run after recent updates. I’ve uninstalled it and reinstalled it (from the repo) a number of times. It is now running.
My problem is with the boinc gui. I start it from a root cli with the command boincmgr. The font is so small that it is unreadable. I have used the kmag screen magnifier and can see some of the text but it is very distorted. No other program windows have this problem. I am using an old flat screen tv as a monitor. The resolution is set to 1360x768.
This is a Lenovo desktop with an NVIDIA GeForce GT 730/PCIe/SSE2. Small fonts are set to Noto Sans 8pt. I doubt the font in the boinc window is even half that 8pt. I see no settings to adjust in the boinc window. The problem occurred only after the latest install.