Indeed blandness is the norm here.
Yesterday, I made schabowy for my guests. They were a bit shocked when I slathered and marinated the pounded schabs before I breaded them with plenty of garlic and lemon juice, and spiced up the flour and bread crumbs with lots of black pepper, papryka ostra, ginger, basil, thyme, rosemary, marjoram, tarragon, cumin and coriander. They tasted the final product with a little trepidation, but were pleasantly surprised and impressed. I'm pretty sure that that one meal represented the overwhelming majority of their herb and spice consumption for the whole year.
Another time, I made REAL Hungarian pörkölt (similar to gulyas, but less liquid) for some other guests. With REAL Hungarian papryka, black pepper, caraway seeds, juniper berries, bay leaves, garlic, marjoram and REAL smoked bacon from the village. And a good dallop of REAL village sour cream and a good sprinkling of chopped dill, parsley and green onion. The older folk thought it was "very spicy" (not exactly a word I would use to describe my pörkölt, which is about one-tenth as spicy as my chili, which I consider only moderately spicy). I later visited them, and they made lecso for me, or rather the Polish version of it. Tasted just like oatmeal. Not a hint of spices, not even black pepper.
However, all in all, Polish food is no blander than any other northern European cuisine. Except, as mentioned above, for cheese, which is atrociously bland. Perhaps the most annoying habit I've come across is adding sugar where it simply doesn't belong, like in potato salad, tzatziki, hummus and tomato sauce. Without a doubt, though, the blandest food I've ever eaten was in the UK.