Usually the llm software reports a lack of memory anyway, which is why I don’t think yours is a memory problem, but I could be wrong!
You could try increasing swap and also use zram tools as a trial to see if more “RAM” would help.? Not as fast as real memory but may be functional. You could also try an ethernet cable to see if that helps as a trial.
Good luck!
If you get time: Please post feed back here if it works. It will help others with a similar problem.