Is it expected that connecting to wi-fi via Macbook Air should seem worse than corresponding connections to the same router in Win10 and/or Linux?

As already reported in older conversations, my wi-fi indicates "Looking for Networks..." repeatedly...

I am a school-teacher, working from home due to COViD-19-imposed restrictions.

Running macOS Mojave 10.14.6 on a MacBook Air (13-inch, 2017) - need to keep it this way, since I use Mathtype, which is not supported in Catalina - I feel obliged to report to Apple Inc. and to the community here that the problem isn't just the indicator, but also the quality of connection, as I am able to conclude comparing with a 2009-netbook that runs ZORiN Lite (Linux 32-bit)...

I have tried to check the response of my hardware to solutions proposed in the thread discussions.apple.com/thread/5792283, but alas, nothing got any better...!

Any new ideas anybody?