Hi this is my first post. I'm fairly new to growing plants, trees etc. I apologize if this is too long or most of the information provided isn't needed but I don't know what is required Thank you in advance. I originally chose the Kagiri Nishiki Japanese maple tree for a pot, the pot that it's in now. I am also not opposed to planting this tree into the ground if that means saving it. I'm not sure what's going on but the leaves are starting to curl at their tips and discolor slowly (brownish) This tree was doing GREAT from the day of purchase in march till about the end of July. I had it in a place that got filtered morning sun to begin with, then to "almost full" morning sun, to a little bit of afternoon sun with shade in the afternoon as well. I thought this would be perfect since it says partial shade to full sun. I noticed the leaves slowly turning and I also noticed a few yellowish, almost wet leaves but the rest of the tree looked fine. As it got worse (drying up tips curled inward) I though maybe too dry, set the sprinklers 5 min longer and that didn't work. So then I thought possibly to wet, or lack of drainage, so I recently moved it to where it gets filter aftneroon sun through my wooden deck privacy screen. When I moved the pot (Terra-cotta?) I noticed the roots had grown through the single hole on the bottom . I have not used any chemical fertilizer or anything. I have mulched it when I planted it but haven't done so since.I live in the High desert region, hot dry summers and cold dry winters with occasional snowfall 3 days a year if lucky. Elevation around 4500 ft. I'm not sure if this could also be a pest problem? I have sort of an earwig infestation lately, I don't know if this has anything to do with it or not. When planted I used bumper crop soil packed loosely. Pics for reference - I have included the first location where it was in my yard, it's in the left hand corner all the way against the fence. The lighter is used for size reference to the pot. Also the hole on the bottom showing the roots. Any information is truly helpful.