DXC destroyed trust internally shortly after Shouty took over. He promised change. He promised to make DXC a people-focused company, with words like "We're going to look after our people, and our people will look after our customers". Fine words, Shouty. But as we all now know, those words were lies. Mike Lawrie was at least honest about what he was doing, Shouty isn't. What's more, DXC also likes to lie to customers; that destroys any trust that the customers may have in DXC.
The trust issue goes far beyond pay increases, as DXC hasn't implemented any real reward mechanism since it was first formed. The trust issue is rooted in the dishonest behaviour of the leadership team of DXC in Tysons. As others have pointed out, the leadership of DXC has been proven to be morally bankrupt, meaning that until the leadership team is replaced DXC will continue to be un-trustworthy.