Were did you dig up that BS?
Obi-wan wasnt weak. He is one of the best at that time, after (not in order) Yoda, Mace, Sidious, Dooku.
Dooku wasnt using form 2 in ep3. He was supposed to lose and be captured. Sidious tricked Dooku into losing to Anakin. He was supposed to be captured, say he didnt know about what GG had done, and become Palpatine's right-hand man in the Republic. He was supposed to kill Obi-wan though, that is why Obi-wan went down when Anakin didnt.