YOU SAID:

the fourth and final bosses plus the level preceding the latter i feel step a little out of "fun and fair hard" and into "tedious hard"

INTO JAPANESE

4番目と最後のボスと後者の前のレベル私は「楽しくてかなり難しい」から「退屈な難しい」への一歩を少し感じます

BACK INTO ENGLISH

Levels before the 4th and last bosses and the latter I feel a little step from "fun and pretty difficult" to "boring difficult"

INTO JAPANESE

4番目と最後のボスと後者の前のレベル私は「楽しくてかなり難しい」から「退屈な難しい」への少しの一歩を感じます

BACK INTO ENGLISH

Levels before the 4th and last bosses and the latter I feel a little step from "fun and pretty difficult" to "boring difficult"