Review Detail of troutrun in Mecha: Defeat The T-Rex Robot From The Start

This novel really deserves 0 stars for lying about the t-rex robot. So far, up to chapter 40, there is no t-rex robot. This story is about a transmigrator who transmigrates into a world with strong mech development. Our MC becomes instantly OP due to his mech system, however, this system which was my initial reading joy disappeared until around ch 36 before the author suddenly remembered to issue another system mission. The author also casually gave our MC a system reward for completing the training mission after the fact, despite never mentioning the system's mission during the training mission arc. A 14-15 year old mysterious loli with the ability to increase our MC's strength was also casually thrown in the story around ch 30. She essentially lives with the MC & his sister as of ch 40 and offers nothing to the story except her mystery and powering up our MC.