When that choice is voting for shit or shittier, it's not really a choice. When that choice is voting for a right wing party or a further right wing party, it's not really a choice. When that choice is voting for a party whose MP's have been funded by private healthcare companies or voting for a party whose MP's have been funded by private healthcare companies you don't really have a choice. When that choice is voting for a party who does not support trade unions or a party that does not support trade unions you don't really have a choice. When that choice is voting for a party that does not support renationalisation of vital infrastructure or a party that does not support renationalisation of vital infrastructure you don't really have a choice.
For an old Democratic Socialist like me, there is no choice between the two major parties, the Lib Dem's are everything I despise, the Greens do not stand in my constituency and I have never felt so disenfranchised.