unfortunately, like every organization there are some rotten apples that spoil it for others.
if you really want to volunteer and you meet all of their criteria, you should approach the coordiantor in your neighborhood and speak with him.
as ”poster” stated, no one should be talking badly about them coz as i said , the majority are G-ds angels who come to help others in need. the small group that you may have issue with should not besmirch the organization as a whole.