Why people do bad things ,bad deeds and wrong things in Ramadan, if satans are chained?

 Satan are chained in Ramadan does not mean that the devils stop whispering into people’s hearts and urging them to do evil; but that happens to a lesser extent in Ramadan than in other months. The effects of this are well known and can be seen. 

https://islamqa.info/en/answers/14014/does-a-wet-dream-invalidate-your-fast