Given the historic significance, plus the fact that it is a fascinating story well-told, one should not get too hung up on Tom Cruise.
Many other fine actors, Kenneth Branagh, Terence Stamp, even Eddie Izzard, have larger or smaller roles.
Also, after some initial concerns about trivializing Hollywood fluff and Cruise‘s personal affiliations, the Germans granted access for filming to many of the actual sites, so the film achieves an unusual level of authenticity. That wasn‘t easy, especially regarding the Bendlerblock buildings in Berlin, in 1944 the HQ of the Replacement Army and center of the plot and today part of the German Ministry of Defense.