I have Ubiquiti UniFi access points, and I ran a physical wire to it since I have an unfinished basement with a few inches of common wall with the garage. I've never tried mesh since I was able to run wires to all three access points in my house.What extender did you install in the garage? What do you think about the Mesh system?
I do agree that 2 bars on the WiFi signal bar is a problem.
Fred