The cobalt question is interesting, and complex.
Yes, the majority of the cobalt used for EV batteries is mined in DRC. And there are definitely human rights and child labour abuses going on there.
Being aware that an EV could well contain a big chunk of cobalt that was scraped out of the ground by an eight-year-old on a chain gang is definitely something anyone who owns, or is considering, an EV should bear in mind.
But of course like everything else, it isn't that simple.
There's cobalt in anything with a lithium-ion battery. The laptop or phone you typed that response on will have an amount of cobalt in it. So no one gets away without blood on their hands for that one. (At least, no one who owns a smartphone, computer, tablet or gaming console.)
Also, technological developments are apace which will first reduce, and ultimately eliminate, the need for cobalt in EV batteries.
So yes, it's a consideration I think. But it's also something that (hopefully) should be addressed within the next few years.