Is it considered rude to tell a jealous and toxic friend that they are jealous and toxic?

I am about to dump a very toxic friend, who was clearly trying to sabotage me and my life in many ways, and I know it was due to jealousy and competition. I kind of just want to let her know how she has hurt me in the years we've been "friends" before I dump her. Would it be mean/harsh of me to tell her I know she was jealous? Is it bad form to say that someone is jealous of you? Or should I just point out her toxic behaviours that hurt me?
Is it considered rude to tell a jealous and toxic friend that they are jealous and toxic?
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