Subaru CHEWS BELTS-ENGINE AND BREAK LIGHTS COME ON

1993 Subaru Legacy
178k miles on it
automatic
4WD
2.2 litre NON turbo
Problem-chews up belts
sounds like belts squealing
leaves belt dust all over front of alternator
break light&battery lights come on&go off at
same time
starts easily
idles rough for about 5 minutes when first started on cold engine
alternator checks out fine under load
battery checks out fine
no fluid leaks
does NOT use fluids

Bought used
Replaced-both front axles
both belts (twice)
starter
What's my problem? Lol