after the sixth gym leader - and not only that, but it is almost entirely useless against the major bosses of the game. I mean, it's good against the first gym leader's Lillipup - and if it couldn't beat that then I'd be very worried - a few of Clay's Pokémon but don't ...
Well the issue is, that sort of things happened mostly due to how unbalanced / unexplored the movesets and TM availability of gen 1-2 (and 3 to some extend) were. I have to agree with you on this! In gen 1 you get a lot of ridiculous TMs and if you happen to have a Pokémo...