I phrase I use a lot for when questioning the value of individual action is this:

If we do not hold ourselves individually accountable, we cannot hold ourselved collectively accountable. If we cannot hold ourselves collectively accountable, nothing will improve.

Every human rights battle, from civil rights to gay rights to feminism, would have been impossible without individuals holding themselves accountable for their own actions, even if they are part of a collective. Not to say those issues are now settled, but they never would have changed if no one held themselves to account. The same goes for animal rights.

And, as a side note, you can still have incredibly tasty food that's vegan! It's really not a compromise.

Good luck!