In the game, will it be better if I hack and make all the attributes 6 when creating my character? Are there any downsides for doing this? Will I regret hacking when I play through the game?

There's just no point, the game expects you to fail and sometimes you even get a better outcome for failing a check, don't worry about any of that and enjoy the ride

*deleted* I'm not here to feed bots answers.

I just killed everyone.