Mural..brings tears to my eyes..

...Well..its may sound wierd that something so little like mural bring tears to someone heart, but sometimes teachers dont understand what their student try to do!Me and my friend has been working for that mural for 14 days to one month!And they dont like it and ask us to erase it?!
Did they think that mural can be done in a blink of an eye?Im not a cardcaptor who can erase something that big in one day! If they dont like it..try to do the mural by themself why dont they!Lets see how good they really are!
"You have to erase it!We dont want that kind of mural,"
If they dont want it..then why ask us to do it in the first place? Why dont they just call a pro to do the mural!I dont understand how they think!
Mural isnt something simple!They shoud at least try to think about their student feeling sometimes..