Late reply, but whatevs
Even having briefly read this part in the webcomic, I don't really get what would be so epic about Golden Sperm. I do love the collective mood swings and belligerence of the little guy(s), but I guess I must have missed a few critical parts.
It has a lot to do with the changed nature of the arc in the redraw. Black Sperm was the undisputed MVP of the webcomic's arc, the strongest member of the monsters. He absolutely carried the arc whenever Garo wasn't around. It's not so much about Golden Sperm in a vacuum, it's about him being the pinnacle of such an already awesome character. Sperm just kept getting the best feats and moments and then he just kept topping himself, culminating in GS.
In the redraw however, there are so many other awesome moments and monsters. not to mention the arc is a million times bigger here. Ugly was a nobody in the comic, but here he was great, totally stealing the show where Sperm did so in the comic. Orochi existing kinda dehypes BS and then there's his cool fight with Garou and massive bonkers insane fight with Tatsumaki and the others. And many, many other things in this giant hulking beast of an arc. BS and by extention goldie are now just one of countless delicious meals in this giant orgasmic feast.
so basically, we're totally spoiled rotten.
And it got even worse after Darkshine noticed that there is someone even shinier than him anyway. The focus is clearly on the loss of shine, not the acid burning his skin.
It seems to me the focus was on Darkshine being fodderized and completely outclassed in every single way by goldie. Not only is his skin unaffected by the acid that's wrecking shine's hitherto impenetrable skin, not only is he more jacked than shine, but even his skin is shiner. I take the 'meager damage' thing as trash talk, "what, are you crying about this worthless, low damage attack that doesn't even affect me?". Darkshine says his muscles and skin are melting the page before that. Surface damage is still damage.
–- Update From New Post Merge ---
I think there are some manga only people here, so I think you should spoiler tag that stuff mando. I agree GS is too bulky, and I wish he came later with more fanfare. But he can still feel special. I'm not worried yet. Maybe his true time to shine, time devoted exclusively to him instead of other baddies will still come. Maybe metal bat will play into that. I'm curious as to why he was brought into this fight by One and Murata.