I also have lots of great things to be thankful for. I've got a great job and have not been unemployed in over 35 years. I have 3 sons and 3 grandchildren.....lots of things to be happy about and thankful for.
The trick is to steer my mind to the positives and the good deal things in my life. That gets me to thinking the key to happiness is gratitude. Gratitude for what is good in life, and ignoring what is not so good.
Certain things trigger depression in me - like taking my morning
Shower and remembering something better off forgotten.
Sometimes the thing that gets me out of the spiral is odd. One of the things that reminds me I need to be grateful for the good is this song.
Peter Green and Fleetwood Mac were huge at the time of this song. They were bigger than the Beatles or the Stones at the time. But you listen to the song and he is really down. He literally had everything anyone could dream of, and was completely depressed.
A short time later he went off the deep end and dissapeared for years. There is some evidence that the drugs he was experimenting with reacted with his pre-existing mental issues - so there was more than depression involved.
He had everything and it meant nothing. No gratitude and no appreciation for the good.
When I hear that song, it reminds me to appreciate the good, and pull out of the spiral.
I have been dealing with similar issues as you for most of my life. One thing i read is that the anxious or hyper vigilant brain is always trying to protect us from danger, but the settings are turned up too high, That leads to the excessive and intrusive thoughts from the past. Others are better able to let things go and trust life.
Those who label words as violence do so with the sole purpose of justifying violence against words.