You're doing great so far, stick with it, however long it takes, and you will be happier for it. Remember, surges of dopamine (or even most chemicals, like caffeine) will change the number of receptors in your brain for that molecule. The same thing drug users experience - many can never reproduce their initial highs, because the body compensated. So the enjoyment and gratefulness you didn't feel is purely biological and chemical as a result of your body's response to high porn use. It needs to protect itself from too much dopamine, and it knows you were partaking in activities that release a lot of it, so as a result, normal activities that should be pleasurable aren't so much, and you don't have the after effects of porn use to make up for it. This will pass, and the time it takes is unique to the individual.
As for others understanding, it's hard for anyone to truly understand what porn is capable of doing until they've experienced it firsthand. From 14-22 or so I would've called it nonsense too, hand waved it away as people's psychological issues that are unique to them. But gradually, by 27 or so (I'm 31 now) the proof was undeniable. I had no motivation to seek out women, when I once did, increasingly extreme novelty was what turned me on, and regular ordinary girls just seemed boring. On some intellectual level, aesthetic level I was attracted, but there was zero sexual excitement anymore. I'm a confident, happy person. I don't have any kind of anxiety. My testosterone levels are above average and my health is very good. Yet I had seemingly lost interest in normal courtship, dating, etc. It seemed as though I became asexual - except when I began to look at porn. Even navigating to the folder on my computer became more sexually exciting than a real woman. Crazy! The longer I can stay away from porn, the more my "normalcy" always begins to return. How could anyone deny the potential for porn to cause havoc in a person's desires?
The one common theme I see though is that it's virtually always worth giving it up and restoring normalcy. I have memories of younger years to know it can be much better than this. I'm rooting for you!