I can't get a good result in predicting ratings

[Shiien]

i use mseloss instead of CrossEntropyLoss to predict ratings, the inputs are userId and itemId, and the target is an integer between 0 to 10. I transform it to 0,0.1,0.2...,1.0 and use sigmod as the last layer. but the output is very similar.why? please help me.