well that's a shame.... you don't need to be there 60 early, but if its 30 you will be rushed. Between the bag check, the toilets, the looking around downstairs, and maybe a piece of tasty pastry and/or a cup of coffee, to say nothing of lining up, checking the layout, and everything else you will find that 30 minutes goes pretty quickly.
If that's your attitude you will probably need to check it at the airplane door, and leave it checked until you leave Italy. You will find that Italy is very good at bureaucracy and that getting along works way better than abrasiveness and loudness. Italians respond way better to honey than vinegar.
If you decide to keep your attitude probably the Borghese Gallery isn't the place for you. It is quite compact and best seen in a bit of peace. The Bernini sculptures are unlike any others I have seen anywhere else.