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!
We are often troubled, but not crushed;
sometimes in doubt, but never in despair;
there are many enemies, but we are never without a friend;
and though badly hurt at times, we are not destroyed.
- Paul, II Cor 4:8-9