Hey... welcome @Syberdelic
I can relate to your experience, though I have to note that a feeling of physiological sickness / poisoning during a psychedelic trip is not necessarily actual poisoning
from the drug you've taken.
The victim blaming prevalent in new age circles is extremely harmful though, and pisses me off. However, I've had experiences with 2C-B and mushrooms where I was beset by a deep sense of physical unwellness... and it turned out that it wasn't actual toxic effects from the drug, but a pre-existing illness that came up front through drastically changed body awareness on the drug - both times I came down with a bad case of flu within days.
(Note this is quite different from saying it's because you have "inner demons", but yea, feeling poisoned during a trip and actually being poisoned are two different things. If you value scientific thinking, it's good to keep this in mind.)
Anyway, @Fenrir mentioned that "ayahuasca tours have become very commercialized"... Well
no shit Sherlock, the very concept of an ayahuasca tour is a commercialized monstrosity. It has been from the start, just as all the Indian guru tours that the rich and famous did back in the 60s. There is nothing authentic about flying to Peru, to take drugs in a society you're unfamiliar with, according to a religion you are unaffiliated with. We're not native rainforest hunters-gatherers.
A rainforest shaman knows jack shit about Western culture and psychology, just as much as we know jack shit about their culture. We have a bias to see the distant and exotic as somehow more valid. If we're keeping within the realms of dogmatic religion, a Catholic priest probably knows just as much and carries just as much wisdom as your Peruvian aya shaman (especially if that aya shaman happens to be a former bus driver or something who did a two week course on shamaning rich westerners). Even though I'm not Christian either, I'd definitely trust a Catholic priest (especially a Franciscan) long before even considering trusting some self-titled shaman-for-hire.
I've never been to Peru to drink aya, but I'm very intimately familiar with how "enlightened masters" are manufactured in the Western new age subculture, and it's not pretty. Most of these people are irresponsible good-for-nothings or downright crooks, who learned the lingo and developed enough
chutzpah to be able to take all the aggrandizement and adoration from their "followers" with a straight face.
Anyway, unfortunately the overzealous, judgemental approach is quite prevalent in psychonaut circles everywhere, just as evidenced by the condescending jabs at your person and the validity of your experience. Still, I urge you to try and understand that being spiritual is not quite the same as this. The point being, don't give yourself into the hand of others (especially others you know nothing about), and keep an open mind.
Do you believe in the THIRD SUMMER OF LOVE?