Here's why:
* "Spare me with" is not a correct phrase. You would typically use "spare me from" to indicate you want to be protected from something.
Here are some grammatically correct ways to express the same idea:
* "Please spare me your criticism." (Simple and direct)
* "Please refrain from criticizing me." (More formal)
* "I'd appreciate it if you wouldn't criticize me." (Polite and specific)
* "Could you hold back on the criticism, please?" (Casual and direct)
Remember, choosing the best way to phrase your request depends on the context and your relationship with the person you're speaking to.