It's been a long long time since I have witnessed an Arsenal keeper being this bad. Last was probably Cech vs West Ham 8 years ago.
(I don't consider Runarsson as a keeper)
Rewatching the mistakes, thought it was interesting to note our players reaction to both the goals. They were visibly disgusted by him and walked away. Gabriel tried to berate him a little for the 2nd goal but even he gave up on the 3rd goal.
Quite a distinct difference to when Ramsdale made those mistakes and everyone ran to him to rally him. Even at the final whistle Raya was trying to get close to Rice and enjoy the limelight but little attention was given to him.