I own the RF 28-70 F2L, EF 24-70 F4L, and RF 24-50mm f/4.5-6.3 IS STM. Three different lenses, and 3 very different price points. One is certainly a entry level kit lens, one was a semi pro kit lens, and one is a muscle building beast that I think is best in class among all brands. They all have their use and place. Lets be honest, no one makes a good compact entry level kit zoom for full frame. Step up, or just accept it for what it is.