Generally from my experience those from GA who come into regionals have a negative perception of ex cadets, and understandably thay comes from the GA echo chamber that cadets are jumping the queue and lack ability.
The reason for that is your average GA pilot has taken exponentially more career/social/financial risk than any cadet will ever take, to basically get the same job and fly to the same standard. Which does lead to a level of bitterness or resentment amongst some pilots.