Yes your choices would have been Al Gore and John Kerry. If you really regret your vote for Bush, in a binary general election , your choices would have been those Democrats.
This subject has come up before sometimes on this site. And I’ve asked people who said they regret voting for Bush as to who they would have voted for instead , if they had it to do over. But I seldom get a coherent answer.
We all have to make choices in elections, and our choices are not always choices that we would prefer.
Voted for him twice. He sucked. Better than Gore or JK. But still a disaster on all counts. People can say he was garbage, because he was.