Not at all. There are good and bad Pokemon from all generations and each region has its ups and downs. As for the games themselves, they're full of problems like glitches and sprites that look nothing like the real thing. Not to mention that you were forced to play as a boy back in those days.
Even the graphical and gameplay advancements from 1st to 2nd gen were astounding and if I feel like returning to Kanto, I'll just play Leaf Green, thanks. But one thing I miss from 1st gen was Persian's Slash going critical almost every time.
Overall however, the advances made since the original games outweighs any sense of "nostalgia" for the 1st gen. People who are 1st gen purists don't usually bother me unless they're trying to push their beliefs on me.