What happened to you is really horrible!
Your bosses were out of order. You gave them 10 years of hard work and loyalty. So you were off quite a bit in the last year because you weren't well, you came back and asked for less responsibilities - it takes a lot of courage to admit you were struggling. They should've been more understanding.
Remember not all bosses are like them!
Try and think positive for when you start your new job in the new year.