Mi ne pensis, ke ĝi tiele finiĝos.

English Translation

I didn’t think that it would turn out like this.

I would translate this as I don’t think that it would end in that way or something to that effect.

English Translation

I didn’t think that it would turn out like this.

There’s past tense in the beginning: “I didn’t think that it would end like that.” (or “thusly.”)