Sidewalks and bike lanes are pointless without better land use. Smaller parking lots. Slower speeds. Dedicated transit lanes. Retail near the street.
These can't be fixed except at extreme financial cost, opportunity cost, and political capital.
Focus on resuscitating the traditional neighbourhoods (as mentioned above) and maybe, if you're successful, your grandkids can redesign the stroads. Or better yet, turn them back to farmland!