Hello. Yes, many people notice a distinct, sometimes harsh or metallic taste in fresh parsley. This is largely due to volatile essential oils like apiol and myristicin present in the leaves.
Flat-leaf (Italian) parsley tends to have a stronger, more robust flavor than curly parsley, which can sometimes taste grassy or slightly bitter depending on the soil and maturity of the plant.
To soften this flavor, you can blanch it briefly or pair it with fats and acids like lemon juice.