It is always difficult to avoid the trap of expressing ones personal opinions about Alix of Hesse at every opportunity, and this is not the place. IMHO it is very clear that the British Royals of the time, particularly those with a higher level of responsibility, felt "let down' by the lacklustre performance and non-delivery of Alix as a member of the "greater" Royal family of Europe, at a time when it was even more unacceptable than it is now.
The spectre of Queen Victoria still loomed over them, and Alix of Hesse, in my opinion, was judged by the British standards of sacrifice, slavish devotion to duty, tradition and hard work. In all of these she failed spectacularly. Queen Mary, correctly or incorrectly, expressed the opinion privately that Alix was singularly responsible for the downfall of the Romanovs.
Yes, I think they disliked Alix of Hesse because her failure was an affront to the family as a whole. The same feeling exists towards Edward VIII, and the late Princess Diana, and others I dont want to mention. Being a failure as a member of the Royal family, or failing to do what you were born to, was the kiss of death. In Alix of Hesse's case it was unfortuanately true.