it's a needle in a haystack, really ...
i would try to move the specific meta-slider CSS inline (so embedded in the HTML) and exclude that from being aggregated.
alternatively you could also try to exclude the woocommerce-css that is responsible for the styling of the woocommerce widget.
lastly I would try to make the selector as specific as possible (to minimize the possibility of it affecting other elements). so instead of .caption use .metaslider-flex li .caption (even if the result is the same) or even something more specific if you can.
frank