The current table layout is certainly not optimal for the purpose.
So, first you should check your configuration of the module in question. Open it through the HikaShop backend -> Display -> Content modules -> the module with ID 174.
For "Type of layout" you have now probably set "Table". Change it to "Div", then check the (newly displayed) section "Parameters for DIV", and under "Type of item layout" select "image and title", or an equivalent from your template (to make it appearing as in your product listings), then save and reload the product page to check.
Obviously, more can be configured in the backend without dealing with code.
So, for your "Related items" I guess it's a setup "issue" rather than a template thing. However, your template has obviously come with view overrides and a specific CSS.
In case you want to change any of it, for both CSS modifications (e.g. to reduce the font size of the product name, also depending on screen size with media queries) and view (= layout) editions you find plenty of information in the HikaShop documentation:
www.hikashop.com/support/support/documen...ize-the-display.html