Okay, theoretically there were other choices. In pragmatic terms, here, not so.
Three candidates on the ballot, one of which struggles to avoid losing the deposit.
Protest votes, spoiled ballots, not-voting are all very well but all amounts to, first, a wstte of time, and second, a marginal increase in the chances of ending up with what in my opinion would have been a monumental electoral disaster.
So I had a binary choice - vote against something I really didn't want .... or don't.