@sbinipizza4 

Hi, welcome to our community.

It is suggested to check link speed on your computer and share the screenshot of the result here.

300mbps is the max link speed that the adapter can be up to under an ideal test environment. The actual link speed is a comprehensive result by your computer and the router.

And, the actaul internet speed is different from link speed. Usually, 40%-50% link speed will convert into actual internet speed.

BTW, what is internet speed that your router can provide?

The guide is also for your reference: What should I do if the TP-Link network adapter is not working properly in my computer?

Thank you and best regards.