Also, my CEO doesn't have enough insight into my work, unlike my superior who I've never had issues with nor was I ever verbally or in written manner told I was falling behind on work.
However, my superior wasn't in the office at the moment this happened and I couldn't get him to stand behind me, but looking at this now (few hours later), the CEO chose the perfect moment to do this.
So, to summarize: I did say I am overloaded, I presented my accomplishments, but the decision was final.