You forgot Promo Mewtwo in the list of game-dominating cards. 40 turn 2 damage was scary.
Of course, a far more likely scenario would be Jigglypuff absorbing that Psychic attack, then evolving on turn two, slapping down a Double Colorless Energy and Plus Power, and OHKOing Mewtwo.
If I may ask as an almost complete novice at the higher stages of TCG playing, why is Farfetch'd up there? Because it has a 50% chance of dealing 30 damage before having to resort to a triple colorless one?
Hitmonchan was a menace in Base, and Scyther didn't exist. Given the choice between Pidgey, Base Ghastly, and Farfetch'd, most people prefered something that could deal 30 damage on turn two.
The metagame was always broken, and I should know that better than anyone. You see, I didn't play the game. I played the metagame. I started playing competitively right after Jungle, and the first thing I did was garner as many copies of Wigglytuff as possible. Good lord, that thing was broken. Unlike Blastoise, who had to worry about Gust of Wind turning Squirtle into turtle soup, Wigglytuff evolved from something with 60 HP and could attack for 20 damage with a Double Colorless Energy. And, unlike Blastoise, Wigglytuff only had to evolve once. Wigglytuff, at least 75% of the time, could easily be hitting for 60 damage on turn two.
The only deck I played at that point did everything in its power to make sure that Wigglytuff was doing just that. I played four copies of Bill, Oak, and Computer Search, and as many copies of Item Finder as I could fine (which ended up totaling three at the end of Gym 2).
Fewer things in TCG history have been cheaper than Pokemon's trapper deck. Imposter Oak's Revenge reduced the opponent's hand size to four cards. A Rocket's Sneak Attack allowed you to weed out any search or draw cards they might have, and should they happen to have more than one, a Rocket's Sneack Attack would eliminate the rest of their hand. There was NO POSSIBLE WAY to recover from this, outside of topdecking an Oak; Item Finder and Computer Search both required at least three cards in your hand in order to work. I, of course, played a trapper deck.
Neo Genesis really was, literally, a New Beginning. Cleffa became even more of a staple than Oak, and made the trapper obsolete almost instantaneously. Wigglytuff, at this point, was horribly outgunned by Feraligatr and easily walled by Steelix, and it looked like the metagame would see the end of Wigglytuff. It did. In return, it got Sneasel, who was Wigglytuff with coin flips, without the evolution requirement. And, the trap was replaced with Slowking, which allowed you to effectively lock the game for your opponent, because the effects of its power stacked. And, with Murkrow, you could effectively checkmate on turn one. Let me tell you something: People say that there's a myriad of ways to counter Slowking. But Muk is too fragile to be played defensively, Igglybuff takes up too much bench space, Pichu is Murkow bait, and Dark Vileplume was just silly. Show me a counter for Slowking, and I'll show you a way to lose to a Slowking deck. If you knew how Slowking worked, you could turn a benched Chansey or Scyther into a win, and believe me, I knew how Slowking worked. I ditched my Wigglytuff for its dark counterpart and lost the trainer chain for an evolution chain. At this point, everyone at the local card shop hated me with a passion. After that...I pretty much quit the game. But not before blowing $85 on a Neo Genesis booster box and writing several rants about the homosexuality of Tyroge and Focus Band flips in Modified. (For those who don't know, Modified was a contest to see whether Typhlosion could beat Feraligatr using Chaos Gym.)
If the TCG ever really had a "golden age," it was a function of the franchise's popularity and the TCG-naive nublets that came with it. After all, when only about 10% of the population knows what it's doing, playing an evolution-based deck is viable, and a lot more fun than trying to win the game on turn one. But I've always been far too impatient for that.
Pokemon TCG has always been a broken game. But, thanks to Nintendo, now we have mechanics to break the game for us, instead of cards. Kill your parents.