Maybe Shia just didn't like the film when he saw it. I don't think he would want to cater to internet fans over Hollywood directors. And as far as what he told Mr. Spielberg, maybe it isn't nice but then again don't directors need to get a little criticism if it's necessary to help them improve? Nobody likes criticism but I call it constructive criticism.
I liked Temple as soon as I saw it as a little girl and I can watch it over and over and still think it's great. I saw Crusade when I was 20 and I had the same love for it I did for the others, and also can see that one over and over again.
I liked IV a little better after seeing it a second time, but it's not one I'd bother watching over and over like the other three.
I can't find any flaws with Temple and Crusade, personally.
Well, my only gripe about Temple is that it's a prequel and I think it should be a sequel. Since in Raiders, Indy is skeptical of the supernatural at first but in Temple he clearly witnesses it.