-Brought 16's head to Gohan so 16 can talk some sense into him which helped Gohan to achieve SSJ2 form to beat Cell
-Befriended Fat Buu and thanks to that Fat Buu helped Goku to buy time to gather enough energy for Spirit Bomb and later persuaded earthlings to give their energies to Goku.
Never has any issue with him he's much more useful than the rest of Z fighters especially Vegeta who caused the majority of problem in Z arcs like letting Cell achieving his perfect form, causing the resurrection of Buu.
Even Goku respects him a lot.
Super also did him justice. In Super he also gave money to Goku because he realized he didn't deserve it even though he contributed much to the safety of earth in Z compared to most other Z Fighters. I can't think how can anyone hate this character.