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I understand your frustration and have compassion for what you are going through, please try to understand what took me years to figure out, and let go of these confounded notions.
Ive explained that, the raw environment, from which the food grows out of, contains all the essential microbes needed to sustain homeostasis within the microbiol inner world of the individual organisms which inhabit the environment.
Antibiotics are like napalm for the microbiom...and it can take up to two years under optimal conditions to fully recover. Typically people who undergo such drug based treatments which lead them to the point of requiring a fecal transplant, do not follow the advise I am giving to you. Imagine hospital patients whose gut flora has been wiped out after taking long term drug based treatments and being given only the most sterilized of foods....of fucking course they are going to benefit from fecal transplant, but that does not mean that there are not better methods.
I make my own animal compost with rotten meat and garden waste, from which I grow the greens I eat, with the dirt, aphids worms and maggots all crawling over everything. The aged meat I eat has what bacteria is needed to help with digestion. The living earth is alive with bacterial forms.... by grazing from the foliage, scavenging for carrion one can pick up all the necessary symbiant organisms by which to thrive.
Also!!! Imodium is poison to the gut stop taking it! Dairy can also be a big problem for such conditions, as well as eating large amounts of resistant starch.