Sounds like you're in the "buyer's remorse" stage of surgery. I'm sorry you are going through this but it's a phase that I went through as well and pretty common from what I hear. Often times we are forced to deal with our issues when we can no longer use food as a crutch to make us feel better so depression is very common. Your body is also trying to deal with a rapid decrease in calories and potentially hormone changes. It doesn't help that we are currently facing a pandemic while you're trying to heal and find a new normal.
One thing I was told many years ago when I started my journey is people who have food addictions must be very careful in making sure they do not turn to a different addiction (alcohol, drugs, shopping, sex, etc.) in an effort to please the same part of the brain food used to.
Take one day at a time. I promise you are stronger than you think and you will get through this. (((HUGS)))