Dang. What's up with ranked?

For context I was pretty close to solo breaking into plat before the season ended. I'm not an amazing player or anything but I think I am decent. With some more time and effort I think maybe I could eventually get to high plat or above.

All that being said I am not getting absolutely smashed in bronze league. Like over and over again. I am having trouble climbing at all. Is this common for the beginning of the season?