What ? Why so many people are liking your post ? Equinox + Poli + Kristian (I wasn't his biggest fan but I must admit that his song was very very good) were all three better than everything Bulgaria had ever sent to the contest.
Sofi's power and fame are unlimited (like her love).
Since 2016, Bulgaria have gone international at all levels (musically, team-wise, even representative-wise with Equinox) and became very successful in the process. That's a fact.
However, whether that change was for the better or not may be subjective, especially on the musical aspect. Some people liked the often colourful and unpredictable acts Bulgaria used to send, even though the results were not good.
Personally, I think Poli's "If Love Was A Crime" was a fantastic effort and a good compromise: it had the international musical codes they wanted to go for, yet it retained a Bulgarian twist, so to speak. Since then though, their songs have lacked spice and identity imo.
I don't love everything Bulgaria have sent, but Kaffe, Elitsa & Stoyan, Deep Zone, Miro, and Sofi Marinova, to name a few, brought diversity to the contest and - IMO - weren't less deserving of support and recognition compared to the most recent Bulgarian acts.