"He's not doing it right"

[milomama]

DS (2.5 years) has been having issues with sharing/taking turns for a little while now.  But I've noticed lately that it's all about the other kid not doing it right or putting things in the "wrong" place.  He'll actually be okay with giving a toy to someone else, I have to prompt him to pick something he thinks that kid will like, but he will do so willingly.  When that kid tries to drive a car the wrong way or builds a tower the wrong way...look out.  My son screams and cries.  Through his cries he is trying to talk and is saying that "he is not doing it right" or "that does not go there" or other such things.  This happens at our home and at other places.  Sometimes other kids are scared as he screams.  He gets over each little screaming fit quickly, it never becomes full out tantrums, but then he will be quick to scream again when the next thing happens.  Although I would like to become more hands-off, right now I am always down with him playing and trying to model the words we can use to talk to others and to set up sharing.  I try to get little things going, like rolling a ball or sharing play food, that help him interact with other kids.  Sometimes I will remove him from play, and we'll cuddle and talk before going back.  

He seems so particular about how his toys are used.  With adults, he also has ideas of how to play, but doesn't get upset...but I guess most adults tend to go along with what the toddler wants.   I'm not sure how to help him go with the flow a bit more when other people do things differently than he expects or wants.  I keep hoping it will pass...but it's been going on for months!