Well, I managed to fix it, I was looking for anything to do with structs since that seems to be where these orphan pins get created as you’ve pointed out.
However it was a corrupted blueprint. I ended up looking at references for one of my various structs and the first blueprint I clicked on causes the same error as when I tried to compile the game, and UE4 started eating system memory like it was a frickin happy meal, which caused the system to hardlock. So I reset, tried to delete from editor, as soon as I tried, same thing.
So I went into windows explorer and just deleted it from windows rather than through the editor and that solved the issue.
Thankfully I have a backup that worked perfectly fine.
Unfortunately, it took from 9am this morning until 4:30pm to figure this out -_-
Today I was supposed to be working on a major feature of my game before the weekend, so people could play test it on Saturday, and the next 2 days I am working my day job so won’t have any time other than what’s left of today…and that just isn’t enough time 