This isn't a problem. 50 rep is not a serious hit and you're kind of doing this:
Anyway, I'm going to give you the rather officious advice that "someone is out to get me" appear very far down your list of troubleshooting strategies. It's reminiscent of blaming the compiler in your first few weeks of C. This should have all come to your mind before trying to figure out if there is a miscreant in the community:
- Do you understand why questions are deleted?
- Do you understand why the questions were of low quality?
- Do you understand how questions are deleted?
If these all pass, next up:
- Have you found an explanation for the judgment calls, even if they strike you as erratic?
- Have you reached out to the community (e.g. posting on meta) trying to figure out what happened?
If you have a meta post where everyone is confused as to why your questions are deleted, that is when it's appropriate to ask someone to "look into it" and make sure there's no weird system bugs or anyone out to get you. Right now, it's like we're writers of a C compiler, and you just asked us what's wrong with our compiler when your program to calculate interest payments failed.
Regarding the policy itself, if you want this policy changed you're going to have to make a serious case for why our deletion policy needs to change. Or why users should retain rep for deleted questions and answers - when we delete a question we're kind of saying it doesn't really attest to, well, a user's reputation.
Anyway as it stands your question is just a personal gripe. It won't get any sympathy unless you think and articulate that there is a problem with our policy that is hurting the site. As far as I can tell, you just got a somewhat sore push to focus your efforts on higher quality questions, which means poor quality questions will get fewer answers and higher quality questions will get more answers... which is exactly what we want.