Thanks for writing back.
1.) In the view "Loop ⟩ List of Software constrained by Software Alternatives tax" skip first 1 item option was selected.
( screenshot: hidden link )
Based on common "Software alternatives" terms, there was only one other software post "Basecamp" that would qualify as an alternative for the software post "MeisterTask Project Management Software", but that was being filtered out, because of that offset to 1 option.
I've changed that skip option to "None" and the view is now showing the "Basecamp" post correctly, as an alternative.
Note: You should also de-select "Alternatives" post type from this view's content selection, since the "Software alternatives" taxonomy is only associated with the "Software" post type. Because of that taxonomy filter, this view can't show any posts from "Alternatives" post type.
2.) As for the view "Loop ⟩ List of Software Images in Software CPT", I see it is using the post relationship query filter to get the information from the same current post, which is not the correct way. This relationship filter should be used only for the cases when we need to get the information from the related posts from the other post types.
If your goal is only to get the current software post's images from the "software-imgs" custom field, you can remove that view from your template and call the image field's shortcode directly:
[types field='software-imgs' title='%%TITLE%%' alt='%%ALT%%' align='left' size='medium' resize='crop' separator=', '][/types]
If you'd prefer to show these images through this view, you can remove the post relationship filter from the query filter and instead add a post ID filter, linked to shortcode attribute "ids".
( example screenshot: hidden link )
And then in your template, you'll call this view using "wpv-view" shortcode and passing current post's ID through the "wpv-post-id" shortcode:
( ref: https://toolset.com/documentation/programmer-reference/views/views-shortcodes/ )
[wpv-view name="loop-list-of-software-images-in-software-cpt" ids="[wpv-post-id]"]