AI Centre - Sentiment Analysis Does not work properly

I have been exploring the sentimental Analysis in AI centre, using AI centre’s out of the box ML Skill.
I find that the analysis is sometimes not even close to the sentiments.
eg -
For the text “It is too good”, it gives {
“sentiment”: “Negative”,
“confidence”: 0.71
}. Pretty high level of confidence for an incorrect analysis.
I know it is not trainable, but somewhere we should be able to work around these kind of errors?
Please guide