I dunno man, Lud's Gate wasn't really that bad imo.
My only huge problem with it was that sometimes it's really, really hard to spot essential items in this game, especially with the remastered graphics. I got very close to the end of the level, only to find I'd missed a required key and had to look up where it was... and no, it didn't really stand out from the floor it was on.
Incidentally, when looking up where to find the damn key, I also found out I had missed a pretty sizeable optional chunk of the level when I decided to drop down that chute instead of going beyond those sarcophagi. TR3 has a bunch of levels where like half of the walkable space is completely optional.
Anyway, the only really hard moment in Lud's Gate was finding the air pocket in that wretched underwater section. The rest went by pretty smoothly. I had way more trouble with finding my way through Aldwych.