I must not have these bug because my gut always sore

Same.

I’m almost positive that decades of poverty meals with almost zero nutritional value has decimated my gut microbiome.

See at least you have a seemingly potential reason. Also, I think if that’s what the cause is, you might have luck with taking prebiotics and probiotics to help garner it back.

I’ve been trying various things from yogurt, sauerkraut, kimchi and supplements and I haven’t really had success. I must be doing something wrong or too much or not enough idk.

I’ve been trying various things from yogurt, sauerkraut, kimchi and supplements and I haven’t really had success. I must be doing something wrong or too much or not enough idk.

Yes, you’re doing something wrong. Wherever you’re getting your health/microbiome advice from is a poor source. You can find better info here: humanmicrobiome.info/faq/

Fermented foods contain non-host-native microbes. Their benefits are hugely oversold. They will not restore your gut microbiome.