Ruin Explorer
Legend
Y'know, it seems like D&D's lifecycle has been one of feeling too limited, at first, then adding options until they start to cause problems, then hitting the re-set button. 2e and 3e, in particular*, followed that pattern.
* Other TSR era eds just had mechanical problems from the beginning, and 4e had PR problems before it even hit the shelves.
I don't really agree and I feel like you're being facetious! Shocking I know!

2E was in a great place, I would argue, in 1999, mechanically. You had tons of options and they were presented well in a modular way. Some of it was silly but it was easy to pick and choose.
Whereas 3E was a mess from year one, thanks to linear Fighters and PRCs and trap feats and monkey grip and fullblades and so on. All the worst, most broken PRCs and combos, especially the practical ones were all in by what, year three? Before 3.5E even, I think. Later books for 3.XE were often far less broken than the early books! To me that's a hard disprove on what you're saying, because they kept 3.XE going after having broken it almost immediately.
4E was also different as you imply. It had PR problems far bigger than mechanical problems and the um, patches WotC kept putting out fixed most major or common mechanical problems. It also didn't collapse from new additions.
Offhand I can't think of any RPGs except Rifts which definitely match what you're describing.
Pretty sure the real reason we get edition resets is partly to update the aesthetics and mechanics and so on, but more importantly to re-sell us stuff like this was a new version of the Sims.