They still have one more game left; they're not eliminated yet , I think if Aston Villa puts together a good performance, they can turn things around. I'm 100% sure Real Madrid will try to turn things around against Arsenal , there's no doubt about that. If they don't, it makes no sense for them to get to where they are right now Just because they had a bad game doesn't mean they're already eliminated , we'll have to wait and see what they come up with.
As long as the second leg has not been played, there will always be hope, even if it is only a small or big hope. And it seems that many are quite optimistic about seeing Real Madrid recover in the second leg. And I probably hope so too. At least I also see that it is possible that Real Madrid will win the second leg. But I, like everyone else, also doubt whether Real Madrid will make it through to the next stage with the sizable aggregate generated from the first round.
Regarding Aston Villa vs PSG, there is still a possibility that Aston Villa can turn things around. It's just that this possibility may be quite slim considering how PSG is performing at their best. And we know Liverpool also lost to this team. So I wouldn't be surprised if Aston Villa suffered the same fate.