うん、少々偏ってるくらいでどうにかなっちゃうものじゃないから
The whole sentence means a little 偏って doesn't matter but why does じゃないから not acting as a negation for どうにかなっちゃうもの
うん、少々偏ってるくらいでどうにかなっちゃうものじゃないから
The whole sentence means a little 偏って doesn't matter but why does じゃないから not acting as a negation for どうにかなっちゃうもの
I think you are confusing two (almost) opposite meaning of どうにかなる.
どうにかなる can mean both to work out, go through somehow and to get cracked, break. The former means "things stay okay" whereas the latter means "something will go wrong with the subject".
For examples,
The sentence uses どうにかなっちゃう in the 'go wrong' sense and I think you understand it as 'work out' sense. The じゃない is simply a negation - so どうにかなっちゃうものじゃない means (it) won't break.