This is actually super annoying to me, I love single player games, story driven fps or rpg or whatever, but everyone just keeps on churning out multiplayer or (even worse) co-op games. I don't have any gamer friends and I don't wanna play co-op with some random person but I do wanna have fun and experience some cool content.
Offhand - Spiderman, Red Dead Redemption, Detroit, titanfall 2,Sekiro, monster Hunter world (kind of - the multiplayer I'd pretty much optional) are all AAA games released in 2018/2019.
There's also a glut of indie games like Into the Breach,Celeste, Dead Cells - if that's more you're thing!
There are oodles of great single player games being released still, and the enteryainemtn value of them is massive - games like Red Dead Redemption have o er 40 hours of content just in the main storyline alone!
I think that the strategy of focusing on multiplayer is failing. There are multiple recent examples of AAA games that created backlash, eg. Anthem, Destiny, Fallout 76.