i need some clarification on if something is considered grief or not

if a support abandons their core because the core refuses to play safe and keeps dying needlessly so the support basically leaves them for dead and goes to help the lane that actually isnt actively sabotaging themselves, would this be considered grief?

reason I ask is I had 2 of these kinds of matches back to back so i ended up babysitting the offlane instead (first a luna, second being a marci) and in doing so we snowballed and won both games, went off for the night and came back to an overwatch punishment of 1 low prio game.

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so basically is dropping the deadweight of the team in favour of helping the actual useful players considered grief if it won the game? because if the punishment system isn't taking into account of trying to win the game over just trying to troll the game i can see why there's so many complaints of "bad supports" because they stick to a lane that just isn't going to win ultimately feeding the game