Well, the whole thing is a great example to other freelancers who are unsure of how to use upwork correctly.
1. Never misrepresent your skills. That will always end in unhappy clients and bad feedback.
2. Just because a job requires a certain location, never change your location. That alone is an offense that can lead to immediate suspension.
3. Never accept a job where the job title is unrelated to your skills. Ironically, the Burmese proofreading job is the only one with good public feedback, but even that doesn't do you any good, because people will be scratching their heads and wondering why you even accepted a job that you are unskilled for. But you say, it was something entirely different anyway. Ok, then you should have asked the client (before accepting the job) to change the job title to what the task really was. Too late to do that now.
4. Even if both your current jobs ended with really good private feedback, your JSS would improve at the next update, but not by enough to get to a good percentage.
Your assessment that you will not find new clients with this rating is very reasonable. The only good news for you is that the JSS calculation windows are 6/12/24 months, meaning that the rating disappears from a profile 2 years after the last feedback. At that point you could try again, but of course your unfavorable work history would still be there. Don't even think about creating a new profile. This is the exact reason why this is not allowed - so that people can't hide their prior work history. That would get you suspended immediately.
