YES and NO!
In my opinion, Junior Gorg hates fraggles when he is having a bad day, and loves fraggles when his life is going swell.
1st.. It should be understood that, at times, Junior would enjoy bashing a fraggle with his club. If everyone pays close enough attention to their episodes, you would remember the very last episode of Season One when Gobo was "THUMPED" by a Gorg. The begining of the episode showed Gobo in crutches, and Wembley making jokes about him getting "Thumped." Therefore, it can be assumed that Junior finally released some stress from Pa by "THUMPING" Gobo. In this case, he hates fraggles.
2nd.. It seems when Junior is in his cheery moods, he sets aside traps, awaiting to capture them. However, to me, it seems as though he simply wants to observe and play with them.
Just keep in mind that although Junior seems to always be cheerful, so to speak, he does have his days when he has been yelled by Pa, and wants to bash any fraggle in sight.