I've placed them in the bathroom next to an open window where its much cooler now, it seems to do much better already.

Yes.
Light, wind and humidity.
They need it. Better outside, but... It is winter.

I wonder if nature knows that its winter with the global warming going on, cause its freaking warm outside for this time of the year.
16 degrees?!
But yes I was totally impatient to grow these in december haha.

Blizen wrote:

I've placed them in the bathroom next to an open window where its much cooler now, it seems to do much better already.

So, you placed a seedling that thinks it is spring in the bathroom, where it is colder and where there's not enough light?
Doesn't seem like a good plan.

Also, you cannot tell after a few hours if the plant is doing better.

So far its going alright suprisingly, it will proboally go dead but learned a good lesson if so, lets see what happens right
No no Its 3 days ago I did this

Blizen wrote:

So far its going alright suprisingly, it will proboally go dead but learned a good lesson if so, lets see what happens right
No no Its 3 days ago I did this

Let's wait and see. FYI: I'm growing black pines from seed myself. They are in their fifth year now (outside, in the garden, of course).
It mostly means just letting them grow, repot in a larger size pot, let them grow again. I have done some pruning this year, but won't be doing much with 'm next year. They'll need to grow more.

Sounds nice! I wonder when there this young they dont need any fertilizer, and only in spring I assume?
Whats a good fertilizer to use for these?