Tess says she had to kill Alec because he wronged Angel, but that she also had to return to Alec because Angel abandoned her. She begs Angel's forgiveness, and he, thinking she is delirious, tells her he loves her.

What happened between Tess and Alec?

Alec takes full advantage of Tess at this point, and he convinces her to live with him as a d'Urberville. Thus, Alec has persuaded Tess to live a life of sin. This deception results in his death when Tess, enraged, stabs him.

Who causes more destruction to Tess Alec or angel?

Angel causes Tess more suffering because she loves and believes in him, only to be cruelly rejected. Alec, although he "ruins" her by "seducing" (raping) and impregnating her when she is very young, is not a person who touches her deeply enough to hurt her the way Angel does.