but Keir Starmer is behaving like he won the Champions League.

I've got to say it was not the greatest day at the polls for the country's leader Boris Johnson.
the concern for labour would be the fact they didn't really snap up as many seats that were on offer. Especially if this is meant to be Boris at his worst given the recent negative publicity
the next GE will be interesting.
I do think laboour are spent force but we will find that out in 18 months.
https://www.thesun.co.uk/news/18487355/boris-johnson-keir-starmer-election-harry-cole/