Will Episode IX be the best of the trilogy?

All that has already been explained. Rey is powerful because the force awakened in her and she is the rising light against the unchecked darkness. Luke does not leave a map with arrows pointing to him. The map was to the first Jedi temple where people who knew him best said he went. Luke does not try to kill Ben. He ignites his saber (instantly ashamed) after seeing darkness in Ben but he never tries to kill him. He leaves the fight because he feels everyone is better off without the Jedi and himself. You may not like the explanations given to you clearly in the movies but that does not make them plot holes.

 

Snoke’s line in TLJ tells us why Rey is powerful. It is because of the Force balancing itself out due to Kylo’s power with the dark.
Snoke: I warned my young apprentice that as he grew stronger, his equal in the light would rise.
He goes on to say that he thought it would be Skywalker but he was wrong and that it wasn’t Rey

Luke does not leave a map behind. The map to the first Jedi temple was removed. The FO and R2 had the main part of the map with the key part missing. It was assumed that Luke had gone to the first Jedi temple so the search was for the missing piece of the map that Lor San Tekka ends up finding

Luke tries to kill his nephew because he has a moment of weakness like everyone is prone to do. He is fearful of the dark that he sees in Kylo and has the moment of weakness. At the last moment he realized that what he is doing is wrong but it is a moment too late. It is similar to how in ROTJ he almost strikes down Vader. He is giving into fear (and anger) when he cuts off Vader’s hand. He then realizes his mistake and throws down his saber.

Luke abandons his friends because he thinks it is the right thing to do to keep them safe. He blames the Jedi of past for creating Vader and he blames himself (and the creation of the new Jedi Order) for the creation of Kylo. He sees the interference of the Jedi causing the dark to rise. If the Jedi end, there will not need to be the Dark to balance against it

To say that these things are plot holes is inaccurate. The questions are answered. Whether one is satisfied with the answers is another whole discussion.

--- Double Post Merged, Mar 29, 2019, Original Post Date: Mar 29, 2019 ---

You beat me to it. My thoughts exactly