totally legitimate argument, im sure your grandfather fought hard for there to never be better working conditions for his grandchildren, and would hate that working conditions have gotten better and continue to improve.

have you ever complained that something tastes bad? dont forget theres starving children in africa, so you aren't allowed to complain about your food tasting bad, because someone has it worse, right?

Have you ever been thirsty and asked someone for water? that gall on you! people die everyday from dehydration, you being thirsty is just hipster self pity, you aren't going to die, so you aren't thirsty

see also:

>Fallacy of relative privation ("not as bad as") – dismissing an argument or complaint due to the existence of more important problems in the world, regardless of whether those problems bear relevance to the initial argument.