The missing 5th dewd here. I just browse kissu /qa/ now to be honest, it hits the 2D/Random spot and has good posters and respectable traffic. I recommend all /AM/ posters to integrate into their culture. I think /AM/ was too much a product of its times, of when we dreamed 8chan would be bigger than 4chan ever was, and /intl/ was at its peak, cementing freedomposting as a viable alternative to rulecucking. What about now? Endchan is a dead end board, it's literally in the name and motto. Creativity has basically dried up. It's like trying to bring a dead dog back to life.
Take what you've learned from /AM/ and apply it to other internet communities. More importantly, study the basics of content creation so one day you can make the internet and even imageboard's a better place. The world could always use more drawfags ready to take requests, or people good at photo manipulation, video editing or creating mashups.
Or you could all ignore me, call me a whiner and make a real change. If enough people got the word that /AM/ is an otaku culture board with a fun culture it could revive. But you would have to get your friends and their friends to post here. You'd have to create successful social media accounts on YouTube and Twitter and shill /AM/ to the degenerate weaboo masses, and ultimately hope the culture generated is as good or better than the old days.