All I know my experiences with 3.5 and Pathfinder 1e were so bad they effectively put me out of the hobby for nearly a decade.
I'm sorry you had a bad time with them. I'm not saying you need to like them. I'm simply saying I didn't enjoy the other D&D editions.
But again, it means having to throughfully research every book for problem items, which vastly increases my work as a DM in a system that already expects DM to do a lot of work.
I wouldn't advise trying to dig through the massive collection of 3.X books for an inexperienced 3e GM at all.
Yes, I have
a pretty extensive list of what I would include and not, because I ran some manner of 3.X (not exclusively, ran other stuff too) for all of the 19 years it was in print through Wizards or Paizo (in 2008 I ran the PF1 Playtest). But there's no reason you should feel compelled to build your own list to match out of the gate if you were going to run 3.x. (
Or my outline for a more extensive rework)
Which is to say: A new GM could start from someone else's curated list (mine being one such example; I'm sure countless other people have made lists of what they consider to be 'Just The Good Stuff', and they're probably all somewhat different to match different tastes).
But you could also start with a 'Just the good stuff' patched PHB/DMG without the expansion content. Maybe PHB + 3.Y houserule document + look at one of those 'problem spells in the PHB' or 'feats to points' type lists - I've seen many over the years, including in ENWorld threads. Eclipse: The Codex Persona (shareware) is a reasonable one for Feats to Points, and you could easily keep 3e's classes while using Eclipse instead of feats, and use 3.Y (free houserule document) to give you AD&D type spellcasting. That would remove the 'trap options' in the feats, while narrowing the gap between classes substantially (Fighter could still use more skills and ranks, and Monk would still be a bit weak, but class balance would be pretty reasonable there and it's a small amount of content). That is a much smaller amount of work if you're wanting to improve the balance of 3e without introducing a mountain of books to curate.
3.x doesnt need to be a mountainous curation task for a newbie, but it does have its problems. I prefer it over the other D&Ds in spite of those problems, due to this or that reason which varies for each alternative to D&D, of why I liked playing/running the alternative
less or not at all.
But if you're fully happy with some other edition or system, there's nothing wrong with just playing what you like.