I have really struggled with barre chords, I did good with the 6th string major chord, 5th string major chords and 5th string minor, but could not do 6th string minor chords. I struggled 6-8 months. I got on google and typed in why cant I play barre chords, found a thread of course and a couple of comments said they had been struggling for years, now I dont feel quite as bad. One person on the thead suggested too make the E chord shape with your last three fingers and let your first finger hang, because if you put your barre finger down first it makes your other 3 fingers less mobile, started too practice this and with in a couple of days problem solved, now switching between chords.