Almond meal and coconut flour are not available to me locally, so I've yet to try either of those. As for flaxseed meal, I've gone through weeks where I've craved the "muffin in a minute" and have used it to aid in my cauliflower crust pizza crust, sprinkled in a salad, etc. I've never had any issues with the flaxseed meal. It's even broke a few stalls for me...guess it's the fiber

I use all three quite frequently in my diet and have almost never experienced any negative effects.

There was one time when I made Amazing Bread with coconut flour and felt like I ate a brick. I did a bit of reading and I learned that it's likely the fiber content going down with not enough water or anything else to help it along. There's also the possibility of a fructose intolerance, but I think that's less likely. Whatever it was, it was bad enough to make sure I never tried Amazing Bread again. And it's been a while since I've gone near my stores of coconut flour to be perfectly honest.

However, I've not had any other negative experiences, even when consuming very high quantities of fiber in the form of these flours. Maybe try it again, if you think you can handle it, and pair it with plenty of water.