I don't understand this. What did The Last Jedi disrespect? The only thing I can think of that was actually dropped from TFA is The Knights of Ren, and they were hardly a presence in TFA.
TFA introduced Snoke as Kylo's master, and TLJ had Kylo killing him to cement his rise to power. TFA had Rey lonely and wondering about her heritage, TLJ answers that by saying that she was nobody, and she'll have to find her own way. because of that. Those are all valid places to take what was set up in TFA. One may not care for those ideas, but that doesn't mean the concepts were brushed aside.
And TLJ ends with a valid set up for a final film, with the Resistance alive but in bad shape against a powerful First Order, but the Galaxy inspired by their actions. Rey, having failed at redeeming Kylo, takes her place as a new Jedi, learning from the mistakes of the old, while Kylo has ascended to Supremacy at the cost of any sort of stability he had. Finn has committed himself to the Resistance's cause, and Poe looks primed to take over leadership of the Resistance. We see hints of Hux being a Starscream-like betrayer when he almost kills and unconscious Ren. The chess pieces are all in place for the final film.
I can understand disliking The Last Jedi. I think it's a messy film, despite really loving it overall. But I think to say that it didn't respect what TFA brought up and that it didn't set the scene for a finale is, in my opinion, just factually incorrect, regardless of whether one liked what it did or not.