Various challenges for evolutionary psychology

I took my kids to an event tonight with Eric Wielenberg, and my 11-year-old daughter found herself puzzling about how our emotions could evolve. I tried to convince her that some aspects of our emotional lives that have plausible evolutionary explanations. But she came up with a number of challenges for evolutionary explanations that withstood my critical scrutiny. They are an interesting bunch:

1. The desire to do what is wrong
2. Happiness, in the sense of contentment—think of a cat lying down while being stroked (my example)
3. The drive to achieve things the hard way even when one can get them without effort—wanting the achievement of getting a meal by hunting even if one can get an equally delicious meal without much effort (her example)
4. Mercy towards weaker animals, even ones that we could eat or that could eventually harm us.

Note that while occasional pleasure can definitely contribute to fitness by rewarding behavior, the kind of contentment in (2) might actually be deleterious, by making us less active. One might think of (3) as a form of practicing, but that seems a stretch in a lot of cases. And (4) is particularly puzzling—it's not so hard to come with stories about a lot cases of mercy towards members of our own species, but mercy to other species seems a lot harder. One might try a malfunction story for (1), but my daughter thinks (1) is too widespread to be anything like a disease, and we surely don't want to say that (2)-(4) are faults. I suppose one could try to find a spandrel story about some of these, but I am not sure how convincing these will be and whether they will fit well with the fact that (2)-(4) seem to be components of our flourishing.

Of course (1) is puzzling on a theistic view (whether evolutionary or not), though perhaps the theist can give a view on which it's a distortion of a desire to imitate God, by desiring to be ultimately in charge. On the other hand, (2) and (4) have very nice theistic explanations.