It is engineered to be unpleasant to wake people up quickly and force them to interact with the device.
The "annoying" iPhone morning alarm sound effect you are looking for is titled . iphone_morning_alarm_sound_effect_annoying_ios_...
Sites like ZEDGE offer various versions, including original and remixed "earrape" or loud variants. Key Characteristics of "Radar" It is engineered to be unpleasant to wake
While "Radar" was the longtime default, newer iOS versions (iOS 17+) have introduced "Radial" as a slightly gentler alternative. Why The iPhone's Alarm Is So Annoying iphone_morning_alarm_sound_effect_annoying_ios_...