Zoro appears proportionally less post-timeskip. That's due to the story shifting from the character focused adventure of the Strawhats, to a grander narrative where the overarching plot takes center stage.
Zoro is the furthest thing from Emo. To be Emo is to be excessively emotional and self destructive. Zoro's a man of discipline and dedication. An Emo would whine about how his life is ruined for having stubbed his toes. Zoro would power through that.
So Zoro cuts things. Yeah, that's what he is. A swordsman. I don't exactly see what more you want from him. Oda still finds some ways to make his fights interesting, or receiving a new blade feel fresh, like one that cuts uncontrollably, or another which drains him more. Zoro's most inventive battle wasn't any of his fights pre-timeskip, it was a post-timeskip fight against Pica, which he couldn't beat by simply cutting down. It highlighted his combat intelligence and leadership skills.
You are projecting the fandom way too much onto Zoro. This bit in particular -
the difference is that Pre Time Skip Zoro had other stuff going for him besides that. Pre Time Skip whenever the crew visited a new island the main question would be - I wonder what every person in the crew will do? Post TS the only question being asked about Zoro is - Who will Zoro fight? If you think I am wrong, just check all Zoro threads here. Now, I understand his ambition is to be WSS but does he really have nothing else going on in his life besides that? If that is enough for you to like Zoro i seriously wish you all the best and enjoy him to the fullest. To me that isn't enough. I preferred Zoro when he had a soul to him, when he wasn't this Edgelord that only wants to fight people.
Zoro's fans only wanting fights from him doesn't translate to Zoro just wanting fights. Zoro expects to fight because he's, what a shock, a fighter. Nothing about this has changed. Zoro gets fights in major arcs. Always has, always will. But it's true that isn't the only expectation, and it's still the case post-timeskip. In Wano alone, he's met several people who've endeared themselves to him. In Punk Hazard he grew closer to Tashigi, no longer viewing her as a Kuina clone, and helping to bridge the gap between Pirates and Marines. He's fought alongside and befriended various members of the Strawhat Grand Fleet during his battle with Pica on Dressrosa. His desire to fight Kaido is a direct result of his character arc throughout Wano, where he takes a proactive role of freeing it because he knows he has the strength to do it, being entrusted with the blade that serves as a distilled reminder of the late Oden's unfinished will. Oda uses Zoro's role as fighter as a medium to tell a story through.
You don't seem to understand that Zoro is a stoic character. Even pre-timeskip, he was the calm and focused one. That's the beauty of the Strawhats. They are a melting pot of various personalities. Zoro just happens to be the serious one. He's the member who provides strength and security. Everyone on the crew respects and relies on him to power through everything and protect them. Zoro, knowing that, takes his training and practician seriously, so as to not let them down. That's the entire basis of the "never lose again" speech.
Concluding, if Zoro is the edgiest character you've ever seen, then you need to broaden your horizon to avoid making such ludicrous claims.