Hi and welcome to the forum
Please read this thread on how to supply information and edit your first post with the required info so users can have data to give you the best advice:
Output of inxi -v7azy would be a good start.
It would help others give advice if you describe with what you measure (site/download/tool) and what you measure against.
If dual booting windows: disable fast boot.
Searching with your favorite search engine for your network card & Linux & performance would be a good start.
