English and grammar errors aside, your argument about the game being unreasonably difficult isn't a claim that holds water. There are plenty of opportunities to bust through any battle without taking so much as a scratch. Though, if you're hoping to play Reborn will a full OU-filled team, you're going to be kicked five flights down. Fights are not meant to be won with full-team sweeps. Believing in that sense of easiness towards Reborn ascertains you'll get your flaming chicken served right back at you in a bucket. Take this Blaziken up against the Ground-type gym leader, Flying-type gym leader, or Psychic-type gym leader and don't expect to get it back well-treated.
By good Pokemon, could you perhaps refer to Beldum, Staraptor, Rotom, Greninja, Bisharp, or Steelix? I think that team could work quite well in Reborn. The most difficult of this game is the test of your mettle, knowledge, desire to go great distances for good rewards, and willingness to make a strategy. Many players already have made their rounds in this game, completing episode after episode. If you can't take the heat, get out of the kitchen. This game's meant to test your competence as a trainer.
The best way to beat this game is with an open mind.