#4. He has become a bit stale as a babyface
Seth Rollins took quite a bit of time to find his footing as a babyface. He turned in late August 2016 and it was really only in 2018 early on where he truly began to find his momentum as a babyface.
That momentum is what led him all the way to WrestleMania 35 and the Universal Championship, but lately, he seems to have lost a bit of that footing again. Now, we're not blaming Seth Rollins by any means.
Perhaps this is an indicator that he is better of as a heel, or perhaps the Becky Lynch storyline didn't really do any favours for either of them as characters. However, Seth Rollins has lost a bit of his momentum as a babyface and perhaps that's why WWE is trying desperately to make him look cool and regain that lost momentum.