My DM brutally nerfed my moon druid

Hello, this is my first post on Reddit and it is to ask for opinions regarding a problem I have with my DM. We are planning characters for a long upcoming campaign (around 9 months) and the DM told us to create the characters in advance. The fact is that for a few months I wanted to play Moon druid because an npc from a previous session was a Moon druid I and I loved his class. It should be noted that I am partially new to D&D (I started in march 2024). The fact is that the DM has denied me the ability to use beast statistics in the wild shape (Strength, Dexterity, and Constitution). It seems outrageous to me and to "compensate" me he lets me use cantrips in wild form and my transformations into Cr0 beasts are without the use of wild shape. Also made a homebrew rule for shillelagh to affect my natural beast weapons.

Obviously I've told him that it's not worth it to me because it kills a vital part of my subclass for a very low compensation. I already have the character created and I have all of his backstory done, I don't want to have to change classes just because he tells me that "using the bear's strength when I have 8 strength breaks the game." I have told him that if he doesn't change the rule I won't play. Am I an exaggerator?

I'm sorry if English is a bit bad, it's not my language.