This is sort of the dilemma. If people define "the game makes me grind" as "any game that allows you to grind", then that's pretty different to defining "the game makes me grind" as "the average player would not be able to get a hang of the mechanics enough to beat it without substantial time investment in grinding". And certainly grinding is not "the game makes me fight some random battles on the way to the boss".
So this. I feel like "lolgrindfest" can often be one of those crutch arguments people use when the fact is they simply struggled with the game's difficulty.