I'm annoyingly sensitive to caffeine (any caffeine intake after midday means I won't be sleeping until 3am). So I took part in James Hoffman's big decaf taste test a few years ago and you'd be surprised how different decaffeination methods tasted! I'll have to dig out my notes but there was one I remember that made the coffee taste like soil.
Try to do your own comparison if you can, but decaf doesn't have to be bad.