I used Softmaker FreeOffice for quite some time, but it was quite laggy when backspacing a lot of text, typing and doing very basic tasks, really. And I have a powerful hardware, so it was not my fault.
I then moved to OnlyOffice, quite good even if not perfect: it does not integrate well with the rest of the OS and had a bare bone selection of fonts.
Open terminal and type:
You probably did not install the firmware for the GPU socket and did not compiled it with the kernel above 5.5 where the issue has been solved. If you need a tutorial, let me know. I already did it and it does not freeze. By the way Elementary OS does not use prefetch directory like Windows. It ...