That’s funny bc from what I saw it was Blake using Leo/Chad more than the other way around. Yes, he was a bigger name and obviously made Chad better known but Blake also knew how popular couples were (having done couple content with Casey before) and really started pushing that couple content with Chad fast (and debuting him on his YouTube channel). And it clearly bothered Blake when Chad started to gain more popularity on his own and people liked him more and not just as his sidekick.
They both gained from the relationship and Chad has acknowledged that but you can see that Chad is doing much better now without Blake and he was really held back in the relationship. It won’t even be long before Chad catches up with Blake in Twitter followers. His growth has been great in the last year.