Perhaps surprisingly I don't think the Trent omission is a really big deal. His lineups are bizarre in general beyond just that, and he doesn't use his time before tournaments properly to introduce players into the team. Tactics are strange too. And the NT form thing is a good point but Henderson is in horrible form for Liverpool and for England so I don't know how anyone could explain that selection.
Now that I have time to type though I should point out that these long tournament runs are not something that should automatically be held in his favor. The prestige point of these tournaments is to keep the highest ranked teams from facing each other for as long as is realistically possible. You aren't supposed to play a favorite until the QF, but maybe that favorite will slip up and maybe you never play a favorite at all. Triumphing against Wales, US, Iran, Senegal, that's a minimum expectation someone shouldn't get credit for here. Even if you lump teams into three tiers like I do, England are at the very top end of that middle tier, would be in the top tier if they were managed properly but they aren't. In the Euros they had to send better teams packing but they also got to play at home. The point being that when you manage an England, Germany, Netherlands, Portugal, France, Argentina, Brazil, Spain, Italy, etc the criticism should be super harsh because there are other people out there equipped to handle the job.