I don't think I've seen anything like this where a class is completely useless against a type of mob. No other caster has this problem where it only has ONE school of damage spells, besides frost and flame shock which you cannot consider.

Since our damage pretty much is lightning bolt (shocks are not mana efficient and what are you supposed to do in the 6 second gap that you will have to cross like 8 times for one mob), elemental shaman can't do anything against them.

Anyone agree with me on this issue?

Blizz lied to us yet again about this. Back before BC came out they said that Immunities were a bad game mechanic and they were going to remove them in the expansion. Yet there are so many monsters in TBC that are immune to so many aspects of different classes damage or CC.

Heck a Fire Mage cannot go to The Eye, for the most part the mobs in there are fire immune.
There is a boss fight in SSC where a mob is immune to nature then water. I guess Blizz's idea was to make a fight that favored warlocks, kind of like Illhoof and Shade. If you don't have a lock those fights are possible just much harder.

Blizzard's "balancing" and the immunities that exist show the apparent lack of caring for their customers.

Wow, the blizzard employees are out in force and they are mad as hell. They must be very bitter seeing daily threads about how shamans got a raw deal and knowing their job is to put a positive spin on a clearly bad problem that their company refuses to fix.