>however all of them without exception - especially if they are sequels - were a disappointment and/or a step down from the 6th gen in one way or another
This is probably true, i am trying to think about one that wasn't and the only thing i recall ATM is Hitman Blood Money, it could be played in PS2 but it seemed way too clunky compared to the X360, the PC version had the unfortunate decision to leave console controls in it so it might've been inferior in that regard but the gameplay evolution was significant if perhaps made the game much easier at times.
Midnight Club L.A. was superior in terms of overall gameplay but lacked the musical numbers, customization in many cars and had downright less cars than Midnight Club 3. It was a compromise but the gameplay was worth it, wouldn't count it as an evolution. Same can apply to GTA IV, it was great but a drastic change of direction compared to San Andreas and more akin to a direct sequel of III.
Mortal Kombat 9 was quite better than Armageddon in terms of gameplay although not that much in terms of content.
Brothers in Arms Hell's Highway was somewhat obscure but did perform as good as the previous ones, ended the series well enough and slipped many strong narratives that predictably were ignored by the media (executing underage german soldiers).
Driver San Francisco was a drastic change of direction too but quite refreshing.
Forza Motorsport games had 3 and 4 in Gen 7 and honestly those seem to be the peak of the series akin how Gran Turismo 4 was its peak in the PS2 days.
Rayman Origins... come on now that was good.
Quite some games but still a minority in that sea of underperforming sequels, so i can concede that point in practical everyday terms.
>games from the 8th gen worth playing... Bloodborne?
It's not so much that the PS4 is a Bloodborne machine, Gen 8 is probably the Bloodborne generation. Some Yakuza games seem good and despite all the memes about them being in PC i can bet good money one will have to do some flips in the future to make them run like we are doing now with some pre-2012 games, so might as well consider them for the console panorama too.
Haven't played them so can't say about them being worthwhile, Alien: Isolation, Lego City Undercover and some of the Wii U games seem decent enough if we count them in the same level as past gens' AA and not AAA.
>And 9th gen, you can just add a flat desert to that pic to represent it
I haven't checked or heard anything lately but that probably means it really is a desert, the crash is here but creatively, not economically. Only remasters and remakes, almost nobody in the industry can create something from zero and those who can don't want their creation getting pimped or want too much money for it.