Get a network extender and plug an ethernet cable directly from it into your PC, putting your extender as close to the router as possible... it'll act like a giant personal wifi connector. I have a 50 foot ethernet cable for this reason when I lived in a really long skinny apartment that was miles away from the router lol...

Extender ($54)

https://www.amazon.com/NETGEAR-Certified-Refurbished-EX7000-100NAR-Nighthawk/dp/B01LW2MFLH/

50 Foot Cable ($11)

https://www.amazon.com/Cat-Ethernet-Cable-White-Connectors/dp/B00WD017GQ

Surprisingly cheap. Surprisingly Effective.