the aircraft was inherently dangerous in certain load configurations with hot/short runway complications
Wookey,
slast is dead right in his response. Most aircraft will, at times, be operated near or at the limit of their take off performance regarding weight/temp/pressure altitude, and give, apparently, 'poor' performance. But this isn't the case, it's just that when operated nowhere near these limits (which the Trident was most of the time - say on domestic flights) the 'better' performance demonstrated might mistakenly be taken to be the yardstick of acceptable performance.
I can remember seeing the localiser aerials at very close quarters on 4 engined jets at certain hot and/or high airfields when starting a long flight.
Certainly, the Trident was never considered 'inherently dangerous' by those who flew it, quite the contrary.