At the end of Phase 1, all we got was Thanos smiling. Phase 2 we got him in Guardians and the end credit scene in Ultron with Phase 3 having the 2 Avengers movies featuring him. Compare 1 to 4, 2 to 5 and 3 to 6. He Who Remains was in Phase 4 but it was more than smiling and Ant-Man 3 is giving us Kang but he's going to be in the movie more than Thanos was in Guardians and he's got most likely 2 Avengers movies so it seems to me that if anything, they're ahead of where they were with Thanos especially since he didn't do anything but order Ronan around in Guardians.