The Magpies are set to soon formalise Hill's departure from the club, cutting short a bumper contract that runs until the end of 2030.
Hill was the hero of the Magpies' 2023 premiership under McRae, winning the Norm Smith medal after a four-goal grand final showing against Brisbane.
But having taken stretches of personal leave, the 26-year-old hasn't played at AFL level for almost a year - making just three VFL appearances in 2026 - and is unlikely to wear Collingwood colours again.
Hill on Thursday shared on his Instagram a vile direct message from a Collingwood supporter that included a racist slur among other insults.
"You have disappointed this whole club and it's (sic) 100 thousand plus fans what you have done the last 18 months," the account also posted.
"... I hope nothing but the worst for you."
Hill posted a screenshot of the message to his Instagram story and captioned it "anyone know this tough guy?"
The Magpies have publicly supported Hill throughout the turbulent period and McRae again expressed his care for the forward's wellbeing - and disgust for those posting abusive comments on social media.
"I'm sorry to hear that, if that's the case. Bobby, our thoughts are with you," McRae said when asked about the abuse .
"Not just for Bobby - what's going on? It's a crazy place at times, isn't it?
"I don't do social media, so bear with me, but I did look on to a website which had feedback, and the feedback is unbelievable.
"It's just a cesspool for people just to vent. I find it fascinating that's actually something that people would be interested in.
"If Bobby's listening there, I'm sorry to hear that's the case. We'll always love him. It's sad to hear that."
The Magpies are counting the cost of Thursday night's defeat after veteran defender Jeremy Howe suffered a fractured arm.
It is the same arm that he broke horrifically after a nasty landing from an aerial contest, also against Geelong, in 2023.
"Howey's unfortunately got a fracture around the same place he fractured it a few years ago," McRae said.
"We're hoping it's on the minor end. He's gone to hospital to get it checked out
"The likelihood is he'll probably need an operation, but it's probably too early to tell until the surgeons and specialists have seen it.
"The things I've been told is it's on the minor end but still it's going to require maybe an operation that might be able to mend it.
"Nothing like the last one but he's got a plate in there since the injury, it's something around that. But we'll know more in the next few hours I would've thought."
Utility Harry Perryman suffered a left hamstring injury - having strained his right hamstring earlier in the season - but McRae said it was minor.
Nick Daicos has a bruised right foot after it was stomped on but played out the game.
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