of course it will be different. and you will be one day less new and more experienced. it is all part of the game - dump on the new guy - makes em feel better about their own insecurities. easy to say - but don't take it personally. it could be Jesus Christ and they'd still do the same!
take the supervisor's word for it. if he's OK with what got done - that is good enuf. you are part of the equation whether you feel like it or not.
hang in there - it does get better. just remember how it feels when the next new guy comes along. treat him the way you wish they had treated you - and you may make a friend for life!
How long, LORD, must I call for help, but you do not listen?
Or cry out to you, “Violence!” but you do not save?
Why do you make me look at injustice?
Why do you tolerate wrongdoing?...
Therefore the law is paralyzed, and justice never prevails....