Wendy Williams' Guardian's Failed Lawsuit to Stop Documentary Unsealed

6:35 PM PT -- A rep for A+E tells TMZ ... "We look forward to the unsealing of our papers as well, as they tell a very different story."

Wendy Williams' guardian sued unsuccessfully to block the release of the new documentary following her struggles ... and now the lawsuit's unsealed -- and it gives an inside look at Williams' day-to-day.

Here's the deal ... the former talk show host's temporary guardian Sabrina Morrissey sued back in February to stop the “Where is Wendy Williams?" doc from coming out -- an attempt that ultimately failed, as we now know.

Those legal docs were originally sealed ... but now, they are available for anyone to peruse -- and they provide a look into both Morrissey's argument and her description of Williams' recent condition.

In the paperwork, obtained by TMZ, Morrissey argued Williams was incapable of handling her own business affairs when she signed the documentary contract. Same goes for her executive producer role -- Morrissey says Williams wasn't able to handle such a job effectively ... including not being able to properly shape how she was portrayed.

SM said WW's ability to care for herself has deteriorated since beginning the guardianship too ... and she says now Wendy needs constant daily supervision to "ensure her safety, well-being, and comfort, and to preserve her dignity."

Morrissey claimed she was originally told the doc would present Williams' comeback story, ultimately showing Wendy in a positive light -- and Morrissey said she was under the impression she would get to see the finished product before it was released.

Sabrina added she was totally blindsided when the trailer came out ... because she said she never saw a final cut of the doc.

Of course ... days before the doc came out, Wendy's team revealed she was diagnosed with frontotemporal dementia and aphasia last year, and she entered a treatment center to deal with her health issues as well.

The creative team behind the documentary said they never would've made it had they known about the diagnosis ... though it seems hard to believe they had no indication of her health struggles given the kind of care Morrissey detailed in her suit.

Bottom line ... the story behind "Where is Wendy Williams?" just got a whole lot murkier.