You’re not properly approaching this.
You didn’t post the model name of your WiFi thingy.
You didn’t post if other people with your notebook model had similar issues.
You didn’t mention if the problem improves when you’re sitting next to the router.
What’s the model name of the WiFi hardware?
Look into the device manager and post it.
Have you actually checked in the device manager if it’s marked?
Example of a perfectly fine one:
When you have the name …
… google if other people are having issues with that thing.
If they don’t …
… google for people having similar issues with the same machine.
If they don’t …
… open your notebook and check if it’s properly screwed in and seated in its slot.
If it is, run your machine under heavy load …
… then turn it off …
… and check if it’s hot.
There.
Start with the hardware first.
That’s because you’re not considering that it might be a problem with the hardware in your machine.
Another route is checking if there might be electromagnetic interference.
An old TV, a microwave, stuff like that.