oh, don't give up ! And plus, you never know, you could have a good shiny spread hidden away :) (I've found a Modest 26/15/31/31/23/31 on my most recent reset, not perfect but it's nothing to scoff at either.)
And the shiny spread also goes for all the pokemon - say you abuse your SID for a modest 31/31/31/31/31/31 Method J. You can catch all Method J pokemon with that :) So it's not just one pokemon, it's basically resetting for a whole spread. And, it is a lot of work, but once you hit it, it's a good feeling :) (I know, hitting my first RNG legendary, I was so happy~)
Also lol sorry if this is too much of a spaz comment;;;