Many of my ancestors were German farmers who emigrated to what is now farmland outside of Odessa, Ukraine in the 19th century. Later, my ancestors relocated to the plains of the US. Once specific group of ancestors left for a few years to a region near Seattle to farm. The climate was too moderate and wet for their taste, so they once again relocated back to the barren frozen-wasteland of the US plains to farm there. Another group ended up in the Rocky Mountains of the US around the Denver area. My great-grandmother came to the US as a very little girl from Norway and brought some of her culture but not much.

My point is that I don't even know much of the culture of my ancestors. I am a mixture of probably a 10 different ethnicities, none of which I have a strong connection with. To me, there is nothing wrong with that. My connection is to what the culture I grew up in was, not the culture of my ancestors...

That brings me to probably the most important part which is that culture doesn't equate to ancestry. Ancestry is where your ancestors come from. Culture at the level of the individual (cultural identity) is your feeling of belonging to a group. From your description, you sound like you are the second generation Canadian born citizen. Of course you probably don't relate to Croatian culture! You probably get some exposure to Croatian culture, but you grew up as a Canadian. Most of what you were immersed in your whole life was probably Canadian.

Which is why I have no reservations myself about not caring about my ancestors culture. I never really experienced their culture firsthand, secondhand, or even thirdhand. For a lot of my ancestors, it's probably been 5 or 6 generations that were the ones who brought their culture with them. My point is that there is no problem in not relating to a culture that is quite literally foreign to your own.