Have you EVER used any competing product? I'm honestly asking because you seem incredibly offended by "issues" that frankly come with the territory.
In the interests of openness: I've never used Veeam - so I'm impartial on this.
I've reviewed every one of your "bugs" however, and frankly the product looks like a dream compared to some of the competitors if this is the worst you can do. Are you really upset that a backup vendor dropped support for an OS that isn't even supported by Microsoft any more? Surely the bigger issue is whether they support Windows 2012 (they do.. the major competitor does not).
Get back to me when there are multiple known bugs wherein backups "verify" as "successful", but are unrecoverable, and KB articles stating "this may be fixed in a future version". Or when a bug that just disables all backups when a DST change occurs has been present in all versions of the product since the year 2000. And when your official support mechanism is to send a tweet...