in LOTV you were doing a cakewalk over your enemy, you never really feel threatened
Someone seems to have overlooked the "Brutal" pulldown menu option...
If the way to remove Amon's grasph from the protoss was to get their hair cut, shouldn't the protoss be able to cut the hair off the corrupted protoss folks quite easily?
As Zeratul proved, no. It would be like trying to pull teeth from an awake Lion, it will not go well. Especially instead of teeth, claws and strength they have plasma blades, shields and psionic strength.
Good luck even reaching the ones controlling the Golden Amada. They will not hesitate to fire their phase disruption beam at you and do not care if you are turned into a pile of burned jelly.
Why does the Queen of blades, the commander of the Zerg, have such a small army?
Most of it was killed by Warfield on Charr during her absence when they went feral (shooting fish in the barrel with his Battlecruisers). The remainder suffered heavy casualties during the attack on the Imperial Palace as Mengsk threw everything the Dominion had at them. Finally all remaining Zerg that were not under her absolute control defected to Amon, and proceeded to mercilessly attack her forces. Let us not forget that she probably ran into Amon's Golden Amada more than once as it tore up the sector, and those Protoss ships are filled with anti-Zerg weaponry as seen in WoL.
Why is the GOLDEN ARMADA so small?
It is small? You only ever destroy a tiny part of it that attack you in Aiur 6. The rest was still in space. In fact most of it was attacking the Spear of Adun, by literally kamikaze attacking it to the point that the ship was forced to hobble away before the solar core exploded.
Where are the Terrans in all of this? Amon is the biggest threat to the entire universe, and all we see of the other races are either under the control of Amon, a small part Kerrigan and Raynor in a few missions.
The Terrans were being totally wasted by a combination of merciless Mobius (with Hybrid) assaults and the Golden Amada. On top of that Valarian was still having problems consolidating power and rebuilding after the madman of a father he had fell so the Dominion had extremely limited military capabilities to the point that all they could do was try their best to keep people alive in the Dominion core planets.
The UED was not involved at all. The only UED person that knows what was happening was Alexi who was right beside Kerrigan as one of her Zerg generals. Further more the combined efforts of Amon's Mobius, Zerg and Golden Amada would not have even scratched the UED fleet which is not only vastly technologically superior to the Dominion but also several orders of magnitude larger than the Golden Amada. Amon only focused on the sector, and it is not even clear if he would go beyond it.
And why does Artanis suddenly become involved in an alliance with the Queen of Blades, the person who have betrayed the protoss multiple times?
Because he realises that she is now a very different person from what he knew. The old Queen of Blades was not Kerrigan, but rather a product of Amon entrapping Kerrigan within. The new Queen of Blades was Kerrigan. Even then, he was still reluctant to accept this, watching her suffer for extended periods before intervening.
Also by the looks of things she was a non-threat to Artanis in person. Artanis could probably solo her any day as he appears physically a lot more capable than Kerrigan. So much for perfect form...