I run an Acid Golem deck.
And guess what? I WIN WITH THEM, USING PRIME MATERIAL AND BARREL BEHIND THE DOOR AND MAGICAL BOX AND STUFF. *ahem* This is one of my favorite cards. Seriously. Sure, it prohibits Special Summoning, but seriously. It can potentially increase your LP or damage your opponents' by 2000. And the Xyz-detaching thing is OPTIONAL. Okay, so its downsides balance it out, but really. First thing's first, it's a THREE THOUSAND ATK beatstick easily summonable by Tour Guide. Maybe Leviair, Leviathan, and Zenmaines have better overall options, this can run over all those pesky monsters over 2500+ ATK easily for two turns. And once again, I repeat, the 2000-taking-damage thing is OPTIONAL. It's either that or detaching an Xyz material. So if you've got your Prime Material or Barrel Behind the Door prepared, then you don't have to waste that last precious Xyz Material just yet which will render your Acid Golem a useless sitting duck. And when your Acid Golem DOES run out of Xyz Materials, well, that's what Magical Box and Creature Swap are for, right? And once it's stuck on your opponent's field, they'll have difficulty getting rid of it, since it'll hinder them from Special Summoning it and will damage them 2000 points per turn. I don't know about you, but the usual amount of decks that have cards like Barrel Behind The Door and Prime Material are very, VERY not often seen. Why? Because they, I have to admit, aren't actually that practical compared to the meta and stuff. But still, since your opponent has like only a 1/1000 chance of running cards like those, they're guaranteed to suffer 2000 per turn. Of course, you'd have to stall for them to die, but it counts, especially when they can't special summon their silly Synchros and Xyzes and whatnot, so they'll have difficulty beating you down. If they run Steelswarms however, or Monarchs, or something similar, well, that's a rare occassion usually. Thing is, Acid Golem of Destruction isn't at all useless. Its effect merely balances it out. Its first function is to act as a 3000 ATK beatstick, allowing it to run over your opponent's newly-summoned annoying Trishula and whatever other monster like that. and then you can use other cards to take advantage of its 2000-damage effect, redirecting that damage either to your opponent or converting it into increasing yours.
And finally, it can be used as a more effective yet harder to exchange Lava Golem, which I have no doubt this was based on. After using a Magical Box or Creature Swap, it'll hinder and block your opponents' Special Summons. Also, your opponent can't use it to attack you when it's out of Xyz Materials, as was the dangerous flaw with Laval Golem and Volcanic Queen. And finally, your opponent will suffer 2000 damage every turn, powerless to stop it. They'd have to resort to quickly beating you down, but how can they if they can't Special Summon?
And we all know pretty much everyone relies on special summoning. That's pretty much it.
In other words; it's not spashable in the long run, but it's balanced. And there you have it. My personal point of view on this particular card.Edit:
yay. I was ninja'd by over thirty replies. Wow.