Mac's mom had a different reason for wanting Mac to get rid of Bloo
It's not so much a matter of her thinking that Mac needs to grow up, it was simple economics driving her decision. She's a single mother, the sole provider for her children as far as we know from the show, meaning she has to earn enough money for the numerous expenses the family experiences through day-to-day life, possibly living paycheck to paycheck, and trying to make ends meet. The expense for a family of four is significant, meaning she has to work very hard. Maybe she couldn't keep affording to take care of herself, her two sons, and Bloo all at the same time. Maybe her hours at work were cut, maybe inflation spiked unexpectedly, but whatever the reason she realized that some hard decisions had to be made, and Bloo unfortunately drew the short straw in her mind rather than her own children.- Why didn't she explain that to Mac instead of making it sound like victim-blaming? Mac's a smart kid; he probably would have understood.
