Thanks for the question. The tree looks pretty bad. The holes in the face of the injury are probably secondary to other problems with the tree. The giant would is older since it shows some significant healing. There seems to be some supports and perhaps a tie just above the big wound that looks like it has grown into the tree. Tree staking should be removes after the first year of transplanting. If the big wound is on the south side it could indicate the wound winter damage (frost cracking). This could weaken the tree and set it up for pests and disease. Water could also be an issue. The brown needles could also be winter injury (dessication).  There also may be some branch cankers. There also seems to be no root flare indicating the tree was planted too deep. Overall, the tree seems stressed probably due to cultural issues and secondary pests and disease,
https://www.extension.purdue.edu/extmedia/id/id-477-w.pdf
https://www.purduelandscapereport.org/article/top-arborvitae-aggravations/
https://www.mortonarb.org/trees-plants/tree-plant-descriptions/giant-arborvitae
I hope this is helpful,