Help me understand Thunder Hammer

I cannot fathom touching the thunder hammer on any class that can use it. I routinely run absolute ops without going down and I have every weapon in the game (excluding Heavy's weapons) maxed, including the hammer, but I just cannot understand how it is even remotely useful at high difficulties.

So, why I hate it. Its unreasonably slow for how little damage it does, and it only gives gunstrike marks on minoris on pommel smashes. This means the one, most dedicated horde clearing weapon fails at clearing hordes due to 1, no quick and consistent armor regen off staggering minoris on hit, and 2, the minoris don't get incapacitated very quickly. So then you pair that with the fact that it is DEDICATED to horde clearing, and therefore is only kind of okay against larger units. It suffers against range with its slow animations and doesn't even do its only job correctly.

Second reason, the power sword is just better for both melee classes. It can clear hordes easily with power style (grants gunstrikes on stunned minoris for armor regen), isn't slow as dirt even while in power style, can easily handle strong single targets with power rakes and/or speed style, AND can handle strong, single targets ALONGSIDE supporting minoris near it with the power whirl. It has better crowd control than the hammer and it doesn't even remotely suffer for it, in fact it's incredibly versatile.

So, am I just using the hammer incorrectly or does it need buffed?