you're not wrong. Just metal heads being elitists. There's other music out there than 80s thrash metal.
Load and Reload have some of my favorite non metal songs, period.
You can be critical of a band's output without being elitists though.
Metallica's Black album is pretty significant departure from the material that made them superstars in the first place. So it's not unreasonable to suggest that it might not resonate with the core base they gathered from the start.
Any band's evolution of sound is a natural thing, as is experimentation. But there's always a risk of losing some fans along the way. Which is also fine.
I'm a huge Rush fan and enjoy most all of their catalogue. They experimented with their sound a lot, never staying in one place too long. There are some out there who only consider 2112-era or Moving Pictures-era the only
true Rush. Yet as much as I think Farewell to Kings through Grace Under Pressure were their absolute peak, I still found something to enjoy in Power Windows, Roll the Bones, Counterparts, etc.
But even I have to admit that there were some real stinkers in there. I once saw a Neil Peart interview where they were sequentially going through their catalog and he would give a couple sentence response. They got to Hold Your Fire and Peart said, "Yeah, I don't know what the hell we were thinking on that one, lol." And I share the sentiment. It was a departure, so props for experimenting. But ultimately it just didn't work for me. It has nothing to do with being elitist about their older material.
Same with the Black album. it obviously worked for them as it propelled them into the mainstream. But it simply didn't work for me as it moved so far away from what drew me to them in the first place. And that's okay. Not everything needs to be for me. But I'd be careful of dismissing skeptics out of hand as just being elitist. If one can critique from a place of intellectual honesty, you do them a disservice when labeling those you disagree with as elitist.
The Black album left me cold personally.