Performance issues.

Experiencing some quite bad performance issues on one of the sites built using woodmart.

I’ve done everything like optimising images (all are quite small), disabling gutenberg elements and wpbakery elements which aren’t needed, configuring caching (W3 total cache) etc but I’m still getting an average score of E on gtmetrix, with the homepage taking approx 6+ seconds to load.

The worst offender is the gtmetrix result: “Avoid chaining critical requests”. All the results are related to woodmart (see attached).
Previously this listed loads of minified CSS (because of W3 total cache), but I disabled minification which revealed the names of all the woodmart CSS as seen in the screenshot.

Any advice?

Thanks.