Crimea is easier to take back than the dombass. Realistically, the dombass will be almost impossible to take back by force, but Crimea is a very realistic objective, although it’s also the most precious to russia.
Saying that Ukraine should forget about Crimea is saying that Ukraine should abandon all territories held by Russia today.
At some point you can be antiwar all you like it’s not in your hands. In this case it’s puttin that need to be antiwar, and as long as he isn’t, Ukraine or Europe cannot be antiwar. It’s sad, but a harsh reality. You need peaceful neighbors to be at peace.