I understand why "make bad art" can be an effective rallying cry for some, but for me personally it has never worked; my entire perfectionist being locks up at the idea of making something bad. For me, it just feels like if something is really and truly bad then what was the point of doing it at all? Personally, I don't find it motivational or encouraging.
The two things I have found that actually do help me are a combination of "I'll fix it in post" (the first version doesn't have to be good, it can be polished up later) and "not everything I make has to be my best work."
don't get me wrong I'm still very bad at accepting either of these things, but I've personally found them more practicable than trying to tell myself it's okay to "make bad art."