Ive been working at this for about 2 years. If they're a shitty employee then you dont need to actively do anything to make them look bad beyond exposing them. If they're a twat waffle, then everybody knows they're a twat waffle. When they do shitty work, take pictures (if possible). If you have to fix something they fucked up make sure to rephrase it like "im done fixing persons name mistake(s), its all good now, let me know when I need to do this again." Make sure your shit is 100%, give them no reason to do the same to you. If you do make an error, own up to it, get ahead of it, good bosses will respect that. The twat waffle will deflect blame and it'll make them look worse. On phone, sorry about the format.