One would think that there is nothing left to be said about the purchase of RedHat, but this article certainly had a good view on the situation, as it precisely pinpoints the reasons why this buy was a mistake and gives some excellent advice what can be done at this point to keep this deal from becoming a total disaster.
https://www.forbes.com/sites/jasonbloomberg/2018/11/18/three-things-ibm-must-do-to-keep-red-hat-acquisition-from-sinking-the-company/#36ad8ca06d29