The choice

In a simple form many elections come down to a straightforward choice between someone you would like to see push through the ideas that you think are important, but never deliver when they have the chance (people who talk the talk, but don't walk the walk) and people who would never do anything that you would see as being of benefit in the first place (people who do not even talk the talk, so the walk is irrelevant) - even if they effectively deliver for their own side while making your life (and that of people in similar circumstances) worse. 

In Germany given the multiplicity of parties, the choice is more complicated. You have the same two possibilities as above, and then others that you might like more, but will never get a majority, so they have to ally themselves with one of the above and water down their ideas, so again you do not get close to what you want to see happen.

Or expressed another way, there are two chances of thing improving - next to none and none! But as a person committed to democracy, you have to support someone - usually the non-deliverers in the sadly futile hope that finally this time they might be a bit more successful, because the prospects of what will happen if the other side wins are so horrendous .....