To me, rhubarb is a very “British” flavour. From the “Rhubarb Triangle” to crumble, it’s definitely something I associate with the UK.
That said, we really kinda suck at it.
The number of purported rhubarb items that actually taste little to nothing LIKE rhubarb seems infinite. The ever-growing catalogue of rhubarb gins is a great example. I’m not saying they’re bad, just that I’ve yet to have one that actually tastes like rhubarb.