No, suicide is useful in that case. Unless the DM is trying to block a specific spell he's implicitly telling you that wizards are too powerful and you shouldn't play one. Roll up your wizard's sorcerer brother and call it a day.
Well..... roll up the sorcerer brother, smack your DM for not having the fortitude to just say, "I'd rather you didn't play a wizard," then call it a day.
Communication is important and passive-aggressive communication (read; bad communication) deserves a smack at best or a rage-quit at worst.