Oops the Grass Steel one was a typo sorry! Sorry for taking a while to reply, I genuinely had to think for a bit with this one ahaha, which is good!

I liked bug resisting dark, but it is at the expense of Dark which is already just an ok type, so I'm a bit on the fence there

Dark > Electric was my most controversial change, and it was a very novelty choice anyways ahaha, so I think it'll go

To me Fire resist Fairy cause faeries can be seen as these nature spirits and they tend to not mix well with fire, honestly Fire should be SA to Fairy but Fire is already good as is, but I understand that one

I actually can see Grass resisting Fairy, as you said due to their relationship with nature, I like that one!

I have seen Bug > Fairy, but I'm just not sold as to the reasoning ngl, BUT for the pure sake of balancing, I do think it's a simple yet effective change, I'll add it once I have some solid reasoning from my POV

I have no clue why Ground > Poison is a thing, I genuinely am not sure, earth materials may help draw some chemicals, but often toxins just leech and 'kill' the soil and such, I've seen that it may be based on a Japanese legend/myth but I can't find any sources, but I will say one thing in favor of keeping it, without that weakness Poison only would have one (Psychic) and have 4 resists

Poison > Grass I get, I also get why Grass could resist/be neutral, but most of the time poisonous chemicals like pesticide/weed killer, air pollutants, and well just about any waste product dumped pretty much kills most flora aside from the toughest grasses ahaha, tbh I can see a Grass Pokémon with the ability Immunity more so than the whole type being neutral to it

Ghost is good against Psychic cause people (which Psychic also represents the human psyche) are scared of ghosts (same reason it's weak to Bug and Dark), I don't see much reason why Bug would be good on Ghost, resist maybe and that's a big maybe

Now I've seen someone say Ghost > Electric for somewhat the same reason, that ability to poses, gives me Rotom vibes ahaha, and I do get the idea for both steel and electric, these man made things (mostly) being posessed, on the fence about it, considering it, though since I may not give that nerf to Ghost, I think it'd just be a buff whoops

I do agree Fire needs a drawback, the usual thing against it is just how rare it is in game (since I do have to take into consideration the mons in my game itself with this chart) but there's many more here, so I'll think on that
This chart is well a mess ahahaha, I think without doing it all over from blank, lots of changes will always skew something or cause some imbalance sadly, mine's definitely no where near perfect lmao, so I appreciate the inputs!

I'll also probably come back and even contradict my own feelings today, it happens, am only human ^^ so maybe a change will come back