Ever since Eric Tom was appointed the C-suite has collected people with simply the wrong set of values. They do not care about the customers and they do not care about the people. They're only about cutting cost and increasing prices: gee, if it's that simple what are they paid those millions for? Mikkelsen left because of Eric Tom and even if Tom was rightly ejected, the likes of Culhane and Nyqvist are there and apparently with too much power over the junior CEO.
Mikkelsen was always focused on the customer and performance. The new management are only about outrageous margins and the new buzz, ARR. The live in an illusion where the biggest and most successful companies would be stupid enough to pay for the value that Teradata would magically create, instead of the cost plus already inflated margins. Come on! If Teradata helps solve a billion dollar problem, their cut definitely is not hundreds of millions but a dozen million for software and perhaps another dozen for consulting. To expect otherwise is a complete under estimation of Teradata's customers, but I suppose the C suite is that detached from reality.
Expect short term stock price increase followed by steadily shrinking revenues. The company will be smaller but probably profitable.