De Gea is getting old and that's very hard for him to find a good offer because of his age, there are many teams that want to hire a player at this age, even a goalkeeper.
I was expecting to see De Gea finishing his career at Manchester United but unfortunately, he didn't get toe enough respect from this team.
Indeed, he did not get the respect of Manchester United because Manchester United first offer had been approved by De Gea, but Manchester United again rejected the offer in order to reduce his salary again and that is what made De Gea leave after his contract ended. In my opinion, De Gea is not too old because he still shows strength and can appear full time in every match.
We'll see if he'll be reunited with Ronaldo in Al Nassr or if he'll join another team in the EPL. I think a lot of offers came to him after his contract ended with Manchester United.