TL:DR; My third attempt at making dutch oven bread from scratch still tastes like flour, although a little less so than previous attempts. Why?
My first attempt I tried this recipe by Tasty. I followed it fairly diligently but found that my dough was way too wet. I probably ended up adding about a half cup more flour total trying to get the texture to seem right. The bread looked fantastic, had a great crunch and gluten development, and tasted disgustingly of flour. It was okay toasted and smothered in garlic so we struggled through it, but it really didn't taste good. I figured the issue was the flour to wet ingredient ratio so I tried a different recipe.
Pic of attempt one: 
Round two was this guy. I again followed the measurements precisely, although learning from the tasty recipe I preheated my dutch oven with the oven itself, and put the dough straight in once it had come up to temperature. Although the dough was a better texture while working with it, the flavor was even worse this time – we threw it straight in the trash.
Round three I went with the same recipe from #2, but this time I tried bread flour instead of all-purpose. I also kneaded a bit more than last time. The outcome was, once again, a good looking loaf, but although it's less flour-tasting it's still not good by any standards. It's also lost a bit of the nice crunchy shell from the first try – it just feels hard now, rather than crisp. I think I cut it open too early which is why the inside is a bit sticky looking, that's my bad.
Pic of attempt three:
I will say my method of proofing is a bit unorthodox – I basically cocoon the bowl with the dough in it inside a nest of blankets with a heading pad. It's winter here in New England USA and getting the dough to rise is nearly impossible in ambient temperatures. I haven't seen any weird cooked textures developing at the bottom of the bowl so I don't think it's an issue of proofing temp, but I can't be sure. The rising seems to loosely match the suggested sizes/timing as in the recipes so to my untrained eye all seems good there.
My other outstanding theory is maybe the taste is due to kneading – I've tended to knead less than the recipe calls for because I get a nice, smooth, elastic ball in only about 2 minutes of kneading instead of 5. Could under-kneading cause problems?
Am I missing anything? It's getting expensive to throw all these loaves in the trash – I need to see improvements soon or my mom's going to stop letting me try!
Best Answer
Your photos each look like decent early attempts at bread making. I would encourage you to keep at it. While I think your process will improve (for example, you probably want to improve gluten development with further kneading or stretch and folds), nothing about your process would impact the flavor to the point of making it "unusual."
I would make two observations. First, you might want to take the temperature of your bread, at the center, near the end of the bake time. Just to make sure you are cooking it completely. It should be 190 - 200 F (88 - 93C). I usually bake darker. If I am using a dutch oven, I will remove the top at about the halfway point, leaving the pan and bread in the oven. I just like the flavor of a darker crust.
Second, the breads that you mention in your comment are typically made with a starter, or are enriched breads. These breads will have a different (and perhaps more enjoyable to you) flavor profile. You appear to have some of the basic technique down, maybe you want to experiment with a sourdough starter and a formula that uses a combination of flours, and allows for more flavor development. It will take more time, but the flavor will be noticeably different.
By the way, you can always make croutons or breadcrumbs with the loaves you don't enjoy.