many charities and donations are scams

I hate how many charities and donations are scams. It is good to donate to charity but these days there are many charities that are scams. I dont want to have to research everything. Even when I do these are a lot of opposing evidence. all the popular ones like unicef,united way,mercy housing water street mission and four diamonds all have negatives about them. I don't even know where to donate. I used to just do whatever everyone else is doing because I thought this many people know best but no one really does research on it.