Thanks for sharing your experience.
First of all, you're not bad or evil or without value. You've had the grave misfortune of having been raised in a toxic, controlling and stifling environment. While you're upbringing is by no means a normal situation to have had to endure (and the resultant extreme emotional turmoil is therefore completely understandable) it's not unique. What's more is that there are many, many people (quite a few of them, here) that have been through a very similar experience and are now living happy, healthy, productive lives. If you just keep putting one foot in front of the other, you'll get there too.
I highly recommend you educate yourself on Steve Hassan's BITE model for control (www.freedomofmind.com) as this is the weapon that's been used against you. The good news is that just understanding it and recognizing it's use will do the bulk of the work of disabling it and undoing it's effects. A portion of the control you've been under has been designed to influence your thoughts and convince you that you are guilty of some crime for the mere act of thinking something. This is an incredibly stifling way to live and is designed to prevent you from seeing a way out from under the control.
I hope you stick around here for a while. If your experience follows mine, you'll find many people here who will show you greater love and genuine support than you've ever found from your parents or in a kingdom Hall. Please know that you're an individual with intrinsic value. You're not going to be punished for lashing out in a difficult situation - and any god that would enact punishment for that would not be worthy of your worship even if he would reward you for it. I wish I had something of greater value to say to help you... I'm sure you'll get lots of support from the many kindred spirits you'll find here.
Keep going and you will find the peace you deserve.