Is it normal that my supervisor tells me that i am not in the right job?

She's basically saying that you need to shut the hell up or else she'll fire you. It's a threat.

Since she's saying this every time you raise a concern, she's basically dismissing your problem and threatening you at the same time. Not only is your issue not relevant, but if you keep bringing it up, you're going on my list. It's very rude, but not particularly uncommon.

The last thing you said is the truth. She simply does not have any solutions for any problems. That pretty much tells you what you need to know.

Just another boss being a dick. I refuse to work for a boss like this that refuses to compromise and can never be pleased. You don't appreciate my labor? well screw you I'll find someone who does. It wouldn't be the first time I've put in my two weeks because of an unsatisfactory boss.

Human lives aren't that long I don't have time for assholes.

Shes probably hinting that you arent that important and you can leave if you dont like how shes running business

Yes. He wants you out. Start looking before you get fired.

I think she's hinting at something for sure.

When she says that the next time say..."Perhaps you are not the right supervisor for this job." And see what she does next.

As I said to a similar post, it couldn’t hurt to send out a few applications.