Please review Magnar’s new MSFS takeoff tutorial and see if you’re doing anything differently: ATR 72-600 for MSFS tutorial by ATR instructor - Part 3: Takeoff, climb and cruise - YouTube
I’m confused by the title of this thread because wouldn’t “climb” be less powerful than “takeoff” in any plane? Something truly bizarre is that CLB is weaker than CRZ in one of the variants. From what I’ve read, that’s the behavior of the real plane.