I have some questions about the Re:zero anime

I just finished S1 and really liked it but has its episodes that felt like filler

what were your favourite episodes from S2 and 3

how long the story to finish since S4 is tomorrow

while i scroll on reddit i see some posts in r/writingscale and r/powerscaling about >!different subaru’s with different personalities that represents Sins and apparently they are very OP and psychological menaces!< was this adapted? If not when