I think the area selection is to blame. Sometimes when you long press you select a small area and not a specific rabbit because it ran away from you.
Area selection instead of clicking would definitely make the game easier for you and you wouldn't have to catch the rabbits one by one.
But sometimes you need to catch them exactly one by one, to stop spreading diseases.
And it's mostly a polishing of controls problems in any game from jams, not a skill issue.
Thanks for you feedback!