Maybe he played it pre-patch 2 lol.
Hyperbole aside, let's do a count.
Name the RPG elements that SoM has, and compare it with DAI? You may find that DAI comes out on top, despite not exactly not knowing what kind of RPG it is.
While DAI might have tried to do a few too many things, half of the things you listed aren't exactly surprising..
Firstly, you said it tries to be part-skyrim, part-witcher, can you elaborate on this please? Because other than certain features (Dragons and GIants ala Skyrim / Submarine resource ping ala Witcher) I don't understand this part.
Secondly, as for it being part action-RPG, part tactical-RPG... Did you never play DA Origins or DA2? This is hardly a new feature for DAI... In fact this should have been 'expected' pre-release.
Lastly, even DAI trying to be an MMO, yes I may have felt like I was playing an MMO at one point during the game (Hinterlands grind) but that was really the only time and I'm never going to complain about having too much content.
Furthermore, having played swtor and DAO on a consistent basis in the past, the MMO-like features of Dragon Age games span all the way back to its roots. So I don't understand what the fuss is about now.
As for it failing, that's entirely subjective, and it's accolades so far disagree with you.
I value your opinion... your arguments are against games that are, as you say, not true RPGs, and you're right (Shadows of Mordor is probably excellent, but not a true RPG imho; Diablo III: Reaper of Souls is an expansion, and it's an action RPG, which to me, doesn't count). However, somebody asked in a previous reply to one of your posts, "What about Divinity: Original Sin?" Maybe I missed it, but I didn't see you speak to this one... If you didn't play it, then no worries... Also, if turned-based games are not your thing, then that's OK as well... But as for an all-around, well-polished RPG experience, D:OS is just that. The only drawback being a "slightly" shallow story-line. With DA:I, it's got the story, but the badly implemented PC controls, and the bevvy of other negative nuances -- poor AI, boring, kinda repetitive "fetch" quests, console-first interface, etc. all kinda drop it below D:OS overall. Were I to vote for PC RPG of the year, my vote would go to Divinity... It just had everything I loved from old-school DETAILED RPGs, but with modern visuals and feel. Anyway, I'll quit proverbially "kissing it's butt". All I can say is that if you haven't played it, you definitely should give it a try.