Delta is puts new hire pilots into the 767/757 doing trans-Atlantic routes. There are very junior pilots flying the long hauls at other legacies as well. Delta also has some captains on the MD-88/90 that were hired in 2016! So no, pilot's don't really think lesser of others. There are a few that think regional pilots are "taking their routes" but that is water under the bridge at this point. Plus the regional pilots do fly into some pretty challenging airports such as Aspen, Sun Valley, and Mammoth Lakes.