I am very upset about my ongoing orthodontic treatment, especially that it has caused for loose teeth in the bottom front

I am a 51 year old female. Started Invisalign 3/2021. Top teeth completed around 5/2022. Ongoing braces on bottom teeth. The orthodontist is well experienced. However, he never warned me that because of my periodontal condition I could have loose teeth and I have four of them on the lower bottom plus huge black triangles. I would’ve never started this procedure if he had warned me that any of this could even be a remote possibility. I feel like he has ruined my teeth for life. What can I do ?