If the too many requests block hasn’t cleared after two weeks, it’s likely tied to your account or IP being flagged. You can try logging out and back in, using a different network, clearing Steam’s cache, or reinstalling Steam. If none of that works, you need to contact Steam Support directly and explain the issue so they can manually review and lift the restriction.

Same for me, the slightest purchase on the market spams my application with an authorization request and suddenly it blocks everything.