It's not clear if this is a fresh install with a new profile. But it can happen that any browser's performance can degrade over time for various reasons: for example, conflicting extensions or some file being corrupted in one's profile.

First you could try creating a new "profile": with Chrome not running, simply rename the folder that has your details: home/yourname/.config/google-chrome/Default to something else. When you restart Chrome, it will create a new Default. Mostly, this solves most problems. For more details, consult the Linux section in Create a new browser user profile.

(If you have valuable bookmarks, you could export them as html before creating the new profile and import them later via Chrome's Bookmark Manager.)

If the browser performs well with the new profile, it could point to an issue with extensions you had installed. Some ad block extensions are known to affect performance, at least on some pages. If it's a problem with a single extension, all can be disabled and enabled one by one to see when performance degrades. You can get at your extensions by clicking on Customize and Control Google Chrome, Tools, Extensions or by entering chrome://extensions in the address bar and hitting enter.

You can also clear cache, cookies, and browsing history by pressing Ctrl + Shift + Delete together and making appropriate choices.

If you provide more details, someone may have specific guidance.