That seems to be how it is for a lot of people, including myself. Perfect Veganism is borderline impossible under capitalism, and I am no "perfect" vegan (if such a thing is even possible). I think that even with eliminating animal products in food consumption is the most important step, and it's one that many people don't take, so it's great that you are working on being able to do that. It gets harder once things like exploitation of workers come into play, and it's generally much harder (if even possible) to avoid. Luckily (and hopefully), the only contradiction that would be posed in post-capitalist society is the consumption of animal products in food (and possibly in things like clothing), and those are the easiest things to adopt personally, and suffer more from cultural boundaries than those presented by capitalism.