Onana told the Overlap: "It's a price to pay. Everything is temporary - last season they didn't face that, and I'm 100 per cent sure that next season we will not face that.
"It's football - I think it's about moments, and we faced a lot of injury crises, lost a lot of important players - but, of course, it's not an excuse.
"It's just a bad season for all of is, and we have to stay positive as we are doing at the moment.
"I know everything will be alright - if not this season, it will be next year."
On criticism from pundits, Onana also said: "I don't pay attention to it.
"I have come into this team to take bullets, because we are under construction - at the moment, we are not the best.
"We have other teams who are doing better than us and we have to be honest and recognise that.
"If things and when things are going wrong, don't go for the youngest player - I'm here to take it, Bruno (Fernandes), Casemiro and Harry (Maguire) are there and we are used to it.
When it's people who were sitting when I'm sitting, who won everything, sometimes it's bizarre - we are in the same boat.
"We try to follow your thing and what you did. For me, I don't mind, but other people may be affected."