I think you can only hit a DELETE route via a form post, because it needs to issue a delete verb.
<form method="post" action="/pim_products/delete">
@method('DELETE')
@csrf
// fields
</form>
It won't work with anchor tags, etc, because those all issue a GET request. If course you could do it via ajax as well since you can set the HTTP verb there.
So if you want to use a delete in an anchor (<a href="/pim_products/delete">Delete Item</a>) then it would have to be a Route::get().
Also, you should probably be passing the ID of the thing you want to delete.