Seeing how well corporate IT apps work on my work laptop (slowness, constant updates and general clunkiness), the main reason I'd never install one on my phone

Seeing how well corporate IT apps work on my work laptop (slowness, constant updates and general clunkiness), the main reason I'd never install one on my phone is that I'm afraid they'll make the phone completely unusable - not thru malice, but thru sheer incompetence.