You always have a right to feel however you feel. If there were not a reason to feel that way, you would not feel that way. Feeling angry and doing things because you are angry are two different things, however. OCD probably makes it harder to separate out the feeling from the doing, since OCD can cause you to feel like you have to do certain things because of the thoughts and feelings that you have, right? But you do really have a choice about what you do.

So, you are angry, and you have plenty to be angry about. You have been through a lot of really terrible stuff and maybe it could have been different. Anger has a message for you. You are not okay with this situation. Right? Once you have received the message, then you get to decide what to do with that feeling. Is it helping you to keep it around? Can you use the feeling in a way that might help you or someone else? Are you acting in a negative or destructive way because of that feeling? You are the only one who can answer those questions, but you can get advice and feedback from people you trust.