I found the pictures in your post through a google image search and I was surprised that they look exactly like what I am finding in my own!
I was curious how your treatment has worked out and if you still think they were flukes.
On my end, I have always been very healthy and active. I don't get sick, ever. (I'm in my mid-40s and have never taken a sick day or needed to) Same for food poisoning - very rare. Even now, I feel fine.
Since late in April, I've been taking garlic - was swallowing 5 whole or split cloves once a day on an empty stomach, but not on a strict basis. Since August have been doing so on a strict basis. Since the middle of October have been feeling much better and cut the garlic down to 2 cloves a day as a test to see if I can have the results without a garlic cloud following me around. Fortunately the worms/flukes/stuff continue to come out.
Been to the doc and done 3 tests, came out negative, which seems to be a common result.
Now I'm been examining my stool and taking pictures to discuss with my doc. I'm noticing the tomato skin thing and the big triangle pieces just like the photos on the internet. I'm also seeing what you are posting. On my end I've been considering these to be tape worms (I think I have dwarf Tapeworms - they are red, smaller and many of them) that are fairly well decomposed.
Am curious if you had Tapeworms as well or considered that these may be tapeworms? (on my end, I'm not 100% convinced what I have, just best guesses)