Need help fixing clan

I became leader of a clan around 44 members, and we’ve got problems! We lose almost every war and people donate garbage. How can I fix this? Most people members aren’t responsive in chat. The current clan settings are:

• Anyone can join
• 2200 required trophies
• War frequency once a week (though this used to be always, and at least 1 member said he wants this)
• Clan location: USA (but I think we have people from all around the world) • We’re a level 4 clan

In the last war only 38/80 attacked, though we did get crushed pretty quickly. There were things like the co-leader only got 1 star in 2 attacks, should I demote him? All the elders and coleaders are left from the previous leader who quit the clan. These problems have been going on for a while but people aren't leaving.