、。
Manners are observed less today than they used to be.
Literal
Manners [topic-は] today, before [than-ほど] are-not-being-observed.
~ほど ('to the extent of X, as much as X') forms the standard comparative-of-extent: '(not) as much as before.' 守られる is the passive of 守る ('to protect, observe, follow rules'); in passive it becomes 'to be observed/adhered to.' The topic shifts from 礼儀 (manners) + 今日 (today) — a doubled topic set against an implicit contrast with 以前.