Im sorry it was so rough for you. If it were legal to just run these fights for someone else, id have volunteered to help you out. Take your time with it, relax and feel better.
With that said, congrats on finishing the fight! Right this minute its not much solace, but i dont remember another solo duty that you should struggle with. You mostly(only?) play as yourself going forward and the next couple that i remember are decently easy. I know it doesnt really mean much for someone else to say that a fight is easy, but i dont remember hearing about people struggling with the upcoming solo fights. So you should be perfectly fine for awhile. And hopefully you can get back to enjoying the game and the story as you move forward. When youre ready. No hurry.
If you care about the story of the fight, ill do the shorty recap here. With spoiler block, because why not.
As the fight starts, Bakool Ja Ja is not just confident he is OVERconfident in his ability to defeat Wuk. During their super brief encounter at the reed parade he not only deflected her best shot, but cracked her weapon in the process and with little effort on his part. He sees her as unworthy of ruling, she isnt a threat. During the kidnapping episode after the rite of pots she isnt the threat, its her friends and allies. He also takes a fairly damaging shot(both physically and to the ego) from Zoraal Ja during this timeframe. He causes mischief, but doesnt directly partake in the fights around Valigarmanda instead seeking to weaken his opponents through the attrition of the turaal vidral. Fast forward to now, and he has arranged for this to be a fight she has to do alone to negate the advantage from Wuk's comrades. The fight begins, and he throws everything he has at her. She is behind, but he isnt quite able to overwhelm her. As she pushes back more and more, as she deflects avoids and survives his best moves, as she just doesnt give up he starts to lose confidence. At the same time Wuk is gaining more and more confidence. This petty bully cant push her around, shes learned too much from her friends and family. In the last third of the fight, Bakool's followers start to interfere in the fight. They are convinced(its essentially their religion) that he must win and start to gang up on Wuk, ignoring Bakool telling them to stay out of the fight. This further loss of authority, along with the large number of followers you drop dooms him. The little girl who he thought was beneath him isnt folding, his people arent listening or following his orders, and the biggest threat of all is just sitting there watching. He was supposed to be the chosen one, but he cant do this. Its too much. And of course, him running off seemingly in terror after the fight confirms this.