Trip urgently needs the proper treatment. After the meeting with Alder our poor guy got zero development, meanwhile Bianca received the massive spotlight. Despite the fact that her only battle versus Ash was in her debute episode and the girl is much more like the recurring traveling companion, not the rival, she got her own Gym battle(like Paul`s one in the DP), some character and pokemon development episodes(Chargestone arc), even her trainer`s skill got shocking improvement. So she got all the things that the main rival, Trip, should get instead.
I do like Shooti. He is really sympathetic character. He is not arrogant jerk like Paul, not the goofball like Barry and Bianca, not even the braggart like Gary. He is just the ordinar trainer with childhood goal.
The problem in the fandom, not even it Trip. When he beat Ash`s puny team in the Battle Club fans said that he`s Sue. When he lost to both Bianca and Dentron they said he is the rookie and loser. What are you want from him after all? Whatever he was, he is still bad character for you. He is not Paul. Don`t expect from him Paul-type actions.
In my opinion Trip is really nice guy with unique team and big bag of knowledge. He is very smart and helpful(remember the Aqua Jet), he want to get better and battle strong trainer(remember his enthusiasm towards Iris), he is very inquisitive and takes pictures of new places, people and pokemon.
Ash just perceives him as a friend, not as rival. That`s the reason of their rotten rivalry.