Review and implement improvements to Amazon Listings

I have 9 Amazon listings that are not performing well at all.

Here is an example of one of the listings.
https://www.amazon.co.uk/dp/B07YDR6H81/ref=cm_sw_em_r_mt_dp_XTrtFbCA9B7NX

I want the set up of the listings reviewed and improvements implemented across all the listings.

It may be that this product is better set up as a custom product, if that is the case then all existing listings can be removed and a single custom listing setting up. Once you have reviewed the products you will see why it may be better as a custom product.