I understand your given point. However, I like the new system. As an honest person I hate all these fake testimonials, reviews and stuff over the internet. Who can you trust?
Of course, there’s always a problem to define a five-star-scale. I might consider getting two logos differently than this buyer of yours, and you will have another opinion on that. But overall, the amount of stars will be more natural and more honest.
First time I came on Fiverr, I was very skeptical. Every buyer got five-stars. But out of three buyers, the delivered quality was worlds apart. So, I gave the first four, the second two and the last five stars. The first two did complain and I didn’t understand it back in the day. One month later, after i have started selling myself, I experienced this issue. But I always encourage my buyers to rate me as they feel. I don’t believe in a five-star-world. I want to have the good and the bad sides pointed out.
I may have a different opinion than many sellers here or on other online freelancer platforms, but I stay my ground and I can live happily with my family.
You can always explain your side of the deal with your comment on the buyer’s rating. I think it’s a nice feature, since I use it a lot and can present my point of view.
What I’m trying to say: I like the new rating system. Don’t worry about it. If you deliver solid work and a client-centered service, constantly, you will get a rating in the range of ≤5.
P.S.: There will always be scammers who manage to trick the system.