It's fair to call out poor performance on government projects - it is the taxpayers' money after all - but some basic fact-checking would enhance the credibility of this article.
Shetler headed up the Ministry of Justice Digital team, which ran several projects including the four transformation exemplars noted. However he did not have responsibility for all IT projects within the wider Ministry of Justice, and none of the projects you mention in your article. It's misleading to judge his track record on the basis of projects in which he had no direct involvement.
These projects (Common Platform, FITS etc.) are being run by a combination of the Ministry of Justice Technology team (separate and different to Shetler's MOJ Digital team) and the various autonomous agencies within the Ministry of Justice (National Offenders Management Service (NOMS), HM Courts & Tribunals Service (HMCTS), Legal Aid Agency (LAA)).
It's not as if the work of Shetler's MOJ Digital team is particularly secret - they been blogging about it regularly for the last few years at https://mojdigital.blog.gov.uk/. You've heard of Google, right?