I was here in 1999, almost from the beginning of TrekBBS, and the VOY Forum was savage. The ENT Forum was given an inch-of-rope moderation level specifically because of how bad it was in the VOY Forum. And the ENT Forum in 2001 was pretty volatile as well. And especially at this point in 2002 (where DSC currently is in its lifetime). Anyone sane or without the stomach for the constant fighting would've left, regardless of which side they were on.
Compared to how things were back then, the DSC Forum today is like nothing. The same number of people aren't being driven away as would've back then, including "haters".
Another thing to consider would be this is the first Star Trek series since 1987 that Rick Berman has had nothing to do with. TNG, DS9, VOY, and ENT all have a similar production quality. DSC is a break from that, which means some people will like that (myself for instance) but several more people won't because you'll have a disproportionate number of fans who either don't like that DSC isn't doing what the other series used to or they don't mind it being different from Previous Trek, but they don't like that it's being different this way and would prefer that it be different some other way. And you'll have people who wish this is was a continuation of the Kelvin Timeline. Maybe they didn't want to go back to Prime or Sort-Of-Prime at all.
So you have more people with different ideas about what this series should've done, they want their say, and they'll voice it. Which I fully support because I know what it's like to be a detractor. Even though I think it's odd for someone to spend years on end watching and posting about a show they can't stand, anyone who wants to do so should be able to express their opinion.