No, not at all. Gen 1 is the second best Generation for the series solely from what a bloody brilliant game it was overall. Even when takin' away the fact that it's the beginning and therefore instawins for series innovation, t'was still a revolutionary video game as a whole and 'specially for handheld games. No Pokegame since has done so much for gaming, not even close, as all future mainstay games play it very safe and refuse t' experiment and innovate.
As such, one could argue that, on a literal scale of comparin' Pokegames without respecting their seniority, Gen 1 is actually better than Colosseum/XD and RSE. The former two are just poorly made games overall, whereas RSE doesn't have the charm all Pokemon games have in some amount; GSC and 'specially RGBY particularly exhibit this charm (and no, I don't mean nostalgia).
The glitches are definitely a result of the team's vidya gaem programming inexperience. GSC, despite bein' released very quickly, had it's code cleaned up very well as well.
I don't get what ya mean by a "loose way" of programmin', but either way it's moreso a matter of poor programming overall. Tajiri 'n friends weren't the most experienced vidya gaem developers and therefore lacked some expertise. 'Sides, it's only natural there'd be numerous glitches as every game would have, worked on by veteran programmers or not.
Not to mention most'a the glitches are initiated by abusin' the limited way data is loaded or breakin' a sequence, things of that nature. It's almost impossible t' encounter 'em 'less you try. In that regard the game's code's stability is fine.
First gen is worst gen [/anti nostalgiafag bias]
On a more serious note, I think it's a pretty cool generation. The games were pretty simple, perhaps too simple, but they were obviously the most revolutionary Pokemon games. You can try to deny that if you're stupid. Really stupid. The Pokemon designs themselves are good too, not my favorite, but still cool.