Not a failure.
Not a failure.

Taking too much at once? Quite likely.
Taking some hard classes all at once? Most definitely.

Being hard on yourself? Yes.
Needing to get your parents to respect your privacy? Definitely.

Your parents had NO right to get into your account. Change your password, change your login ID - but stealing into a person's personal information like that is illegal. It's also not very nice - your parents do care about your schooling, but that's just crazy.

Is there any reason specifically that caused you to do poorly this year? Stress? Anxiety? Course material? Depression? Learning disability?

Perhaps you can talk to an academic advisor and see what you can do to learn from this and manage to make up the classes and all that stuff? Asking them for advice is allowed. If you don't have an advisor, what about someone who can give you that sort of advice?

You do not suck. I've had a crappy year myself and I wasn't even taking that many classes simultaneously!! I've passed ONE since September. Not a good year for me.

You sound like you need to have a sit down chat with your parents. Withhold the information (as much as you want) about your final grades but explain what's been happening with you and your academics. If that's not a possibility - can you move into your own place? Sometimes our parents invade our privacy and make things more complicated than they need to be and the best solution is to GET OUT of the house!