I liked TROS better after multiple viewings too though it is very flawed.
The worst Star Wars movie is probably TPM, then AOTC (I do like ROTS a lot-- fanedited to remove the schlock). Followed by ROTJ (terrible editing choices that highlights all the terrible acting).
The best movies are TLJ, then TFA, then Rogue One. I like the New Trilogy better than the Old Trilogy.