Harry’s whole life and the plot.

Oh, well you see, the bad things that happen to Harry are depicted as bad by the book, whereas the slavery of the house elves is depicted as a good thing, or at least how things should be. The characters don't just shrug off someone's death and say "they'd be happy to have died for the cause," but they do say "house elves are happy to work, so we shouldn't end their slavery." That's the problematic part, and what makes it worse and worth talking about.

No, you see that because it’s what you want to see. She’s nuts but not pro slavery, and I think thats obvious to most readers.

She's very pro- house elf slavery. I don't know how you're reading the book (or just the wiki page in this case) and coming to another conclusion. The person trying to free them is seen as ridiculous, every character besides her thinks she's a hopeless idealist who doesn't know how the world works for wanting to end slavery, and even the main character sides more with the "why is she so upset about this" side than "we should end slavery".