Elections may be a source of frustration but they are the only mechanism open to you when push literally comes to shove. People like Trump, May, Corbyn and Sturgeon don't elect themselves, we put them there. So we as electorates have a responsibility to get engaged. For example, without the votes for Leave in Scotland and Wales the UK wouldn't currently be negotiating Brexit, so every election does matter.
Who are the 'they' that you don't like in the Council, is it elected members or officers or both?