As you said, way too many hybrid fruits and veggies out there. Many were bred to become bigger, have less seeds and contain more sugar. Apples, Bananas, Watermelon, Strawberries, some cruciferous veggies, even the bigger version of tomatoes, are all fake man-made unnatural foods. Same goes for A1 cow breeds such as Holstein/Frisian, which were created to have bigger udders to increase milk production. Chickens used to be much smaller until they got bred to look like they look today. The foods that were consumed when nature was still nature were, at last in my opinion, meats and fats, berries, herbs, maybe some nuts here and there and fungi.
Anyway, I once did some research of low anti-nutrient foods, that was when I had a lot of food intolerances and when I did my AIP diet. Personally, I would consider cucumber, summer and winter squash, carrots, artichokes, asparagus, onions, garlic and some fungi the most tolerable when you have lots of food sensitivities. Also some berries such as black and red currant, cranberries, blackberries are ok. In Rasperries the oxalate content is once reported as high then very low. Even blackberries are FODMAP. For nuts I´d say the least troublesome in terms on phytic acid and PUFAS are macadamia, allthough I have issues with them. I used to have big problems with nightshades such as tomatoes, aubergines and bell peppers, now I eat tomatoes on a daily basis. Once healed, your body can adapt to previously inflammatory foods. Same goes for meats, Pork has lectins if not cured or put in an acidic medium, lamb is high in histamines, salmon can cause other issues, aged beef and meats are high in histames. Once you healed your gut you are able to eat foods that are known to have anti-nutrients. Even Li Ching-Yuen, the guy that lived to 256 years or longer reportedly ate goji berries on a daily basis, and these are nightshades. So, once you have a strong microbiome, I think your bacteria adapts and you can eat anti-nutrient foods without issues.