As i was checking my soil today i accidentally spotted a few of these veeery tiny bugs in the soil(a bit under the surface). I am relatively new to this and I dont know yet what it could be. I supposed that they were aphids but im not sure. I have 2 pictures comparing the one i caught and killed to a toothpick. Thank you in advance.

Im sorry I dont know why werent the pictures sent.

The pictures is obviously not good enough for correct identification. But my best guess is soil mites. No threat to your tree, but a sign that your substrate is too heavy on organics and too wet.

I think You're right. Sorry for the bad pictures but they are just so tiny and my camera is not that good, thanks for the help anyway
and for your advice.