Is it bad to use MacBook pro with battery every day.
There is no harm in running on battery most of the time.

To get the most out of your MacBook Pro's battery, follow the Notebook Battery advice from Apple: unplug and use your battery until empty about once a month, then charge back up to full.

If you need help following Apple's advice, use Battery Guardian; it is free and will remind you when to deplete your battery.