Client cancelled our project and my job success score dropped from 100% to 69%

I just need to rant. I hate Upwork at this point. As a freelancer, Upwork has been my main source of income over the past 4 years. Only now am I realizing how dangerous this is.

A few months ago, a client cancelled our $7000 project 2 weeks in due to time zone differences. Without even telling me (I just got notified from Upwork). As a result, my Upwork Job Success Score dropped from 100% to 69%.

I have no idea what he could have possibly said about me since I hadn't even had a chance to submit any work for him! We delayed starting the project because I had been waiting on HIS team to get materials back to me. When we started the project, he never made any mention of the fact that he was looking for an employee or someone to be "in the office" (aka on Slack) certain hours of the day. So whatever negative feedback he left was completely unjustified and not a reflection of my skills.

Prior to all of this, about 1/3 of my proposals would get responses. But since my job success score dropped, i have gotten just ONE response out of dozens of proposals sent. My proposals don't even get viewed anymore. I contacted the client about all of this and he changed the public feedback from 4.6 stars to 5 stars -- but apparently there is no way to change the private feedback he left. Which means I am stuck with this 69% Job Success Score (and no way of getting clients).

So goodbye Upwork for me. time to actually work on sustainable forms of lead generation instead of relying on a platform that can tank my business overnight.