Regarding Aston Villa in the Champions League, yes they have really tried because even I didn't think they can get up to this stage of the competition, but the truth is, this particular stage might choke them but hey this is also football where anything can happen at any point in time. Liverpool didn't leave the competition at their own accord, they were eliminated and I see no advantage on them leaving at this stage, because it now this period that they were supposed to concentrate on the competition since they are 13 points ahead of Arsenal in the league with less than 10 games to go.
It’s so sad that Liverpool have been knocked out of the Champions League. No one expected that to happen, but still, they have the Premier League, as we all know that there is no way Arsenal will meet their points total because it will not be as easy for Liverpool to lose over four games while Arsenal will keep winning, and if not, there will not be any chance for Arsenal to meet up to the points interval given by Liverpool, so it will not be as easy as they will think.
Furthermore, talking about Aston Villa I think this should be their stopping point in the Champions League, as I am very sure they will be knocked out by PSG, which OSG will meet up to the semifinals just to be knocked out by either Real Madrid or Arsenal, which I am very sure PSG can never meet up to in the Champions League because it has been long since PSG had the dream of being in the finals, but it’s never been possible.