I play WHM on PS3. I struggled until I went into the setting and changed the target filters, so it allows me to cycle through enemies and goodies, and/or only one...you can change ad hoc
So, unless you change the filters...yeah, it is bonkers hard....but there is a remedy!!

EDIT: Assume you are talking about changing between targeting party members and evil enemies!
Once filter set; right left direction buttons to cycle....and always up, down directional for party