I see the medium has shrunk down quite a bit inside the container. My guess would be your 2 year old tree has never been repotted. From looking at the photos posted, it looks like only 1/2 of the container is now occupied by the planting mix. That mix is more than likely compacted to the point of filling most of the air spaces with retained water, leaving little room for oxygen. Further, compacted soils do not allow for air exchange, thus the carbon dioxide coming off the roots is unable to escape. Both scenarios are not good. This can be seen by looking at the tree's limp foliage. Crinkling of tender leaves is normally caused by thrips sucking the juices out of the leaves. Action on this tree need to be taken soon.. Good luck to this tree.

Thank you for the advice Silica, i actualy repotted him yesterday because I over watered, and found that the roots didn't go down very far, so that's why he's so far down. I don't think the soil is compacted but I will take measures for it.