Internet Speed

[wireless]

We've been paying for Telus 300Mbps for 3 years and have never gotten anywhere near that speed. The router/modem (Telus T3200M) is in the basement and we have a Telus Booster on each floor. We average 85-90 for both download & upload. We've had Telus come 3 times in 3 years and they all say that is "NOT" unusual in a Wi-Fi setup, and that we are receiving 300 Mbps at the modem.
SO, I've finally broken down and decided to run CAT 6 ethernet cable directly from the modem to our our 2020 Mac on the 2nd floor. Imagine my surprise/dismay, when I plug in the cable to my Mac & my Upoad/Download speeds still average 85-90.
I don't understand. I just assumed that being hardwired my speed would go up SIGNIFICANTLY!

HELP!!


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