musescore suddenly sounds harsh and terrible to the ear, and everything sounds so sharp

One day I logged on to musescore, and everything suddenly sounded fake and before the playback actually produced some amazing sounds! Now for some reason everything sounds like a weird synth, and everything is harsh and dissonant to the ear, and the piano sounds terribly bold. Even when I adjust the dynamics it still sounds horrible! How do i fix this, i want the old sound back!

Heres an example of something i began to upload before the sound quality went down: musescore.com/user/55287516/scores/19686607

and here is the same score now! Why does especially the strings and piano sound so horrible! and the balance is all out of wack, all the horn instruments are so weird, just everything is so weird: It wont let me upload an audio for some reason but the quality is horrible!