I have seen it claimed that the line often quoted as "God made them high and lowly" is really "God made them, high and lowly"; which attributes to God the responsibility for their existence but not necessarily for their status. However I agree with Michael: it is illogical to praise one's god for the good things while ignoring the bad things. The "moves in a mysterious way" argument is an admission that God as generally perceived does not make sense to human minds.

Whether that means that God is really
a) so far above us that we shouldn't try to understand, but should just accept,
b) perverse and therefore unworthy of respect, let alone praise, or
c) imaginary
is a question discussion of which on here is unlikely to be productive.