That has absolutely nothing to do with what I said. If he slowed down your game, ran offside, misspassed etc, it could be for a number of reasons. Villa has been playing in this league his whole life and most of the players the past 4-5 years, and he hasn't hit top form yet either.
My central argument for Ibrahimovic being the best, by a mile, is because he's proven the most. He hasn't had the luck to win the Cl, but his first year with a quality team around him reached the semifinals and scored goals, even though he was in a slump. The fact still remains that there's no other player that has Ibra's influence on a team. He can win with any team, if the players around him are good enough, which any of the top clubs player are. Having that sort of record, is way more impressive than winning a Cl anyway. It's Godlike..
In fact it's so good that when he joined Milan the bookies instantly changed the odds on them winning the league from 7 to 2.
Now they haven't won, and I don't think they will, but just the fact they look capable when most of the experts were saying Milan would risk not qualifying for the Cl, before Ibra arrived, says more then enough.
Oh and more thing. That's not accurate "all he did was slow our game down". I concede that he looked a bit lost in your system at times, but I can remember one match where he was subbed out and Barca started playing better, and it was against Inter at Camp Nou, and that probably had more to do with Pique just scoring than anything else. Rest of the time Barca played better when he was subbed on. There's many examples but Malaga and the Clasico are two.