OK first off, check out what WiFi band is getting through. You can get some mileage by enforcing the router and clients to connect on a specific band - they are supposed to auto select based off the best/least congested band, but these days nearly everything is squawking away there. You could try relocating your router/AP and testing - if there's a duct or a bunch of pipes in the way they may be interfering or opaque to the radio band, so moving the router might honestly result in better performance. Tape it to the ceiling if you have to (3M command strips work pretty well)
2.4Ghz gets far greater wall penetration than the modern high bandwidth 5Ghz band solutions, but it'll be limited to 54mbps or slower.
Not all WiFi access points are created equal. The antenna on a Linksys Router/AP ($??) vs. the antenna on an Ruckus AP ($500+) is a totally different animal, and it shows.
Effectively trying to coax a good signal out of radio equipment without a proper survey is more akin to dowsing or engaging in a magical ritual than anything really technical though...
The economy didn't respond they way "it should have" by tightening... so corporates had to just resort to good old fashioned collusion to teach the workforce they can't ask for things like hybrid and payraises.
It's kind of blowing up in their face.