Brakes upgrade

I’ve got factory fitted Shimano M445 on my trail bike. I mainly use my bike for road commuting and a bit of off reading. The back brake hardly engages so I use both brakes together most of the time.
What would be a good upgrade model? Any suggestions?
Ta
What would be a good upgrade model? Any suggestions?
Ta
0
Posts
And it all promised so so much”
Giant Trance 2 27.5 2016 ¦ Sonder Broken Road 2021¦ Giant Revolt Advanced 2 2019 ¦ Giant Toughtroad SLR 1 2019 ¦ Giant Anthem 3 2015 ¦ Specialized Myka Comp FSR 2009