From Public Health Scotland today:
For the quarter ending December 2022: 70.1% of children and young people were seen within 18 weeks of referral, which is an increase from 67.9% for the previous quarter
https://www.publichealthscotland.scot/publications/child-and-adolescent-mental-health-services-camhs-waiting-times/child-and-adolescent-mental-health-services-camhs-waiting-times-quarter-ending-december-2022/
BBC Scotland, however, fails to inform its audience with this in December 2022:
Vulnerable boy ‘failed’ by two year wait for mental health care
https://www.bbc.co.uk/news/uk-scotland-63906810
BBC Scotland also offers readers an insensitive and tasteless image of one traumatised child, to help them understand the nature of health services across Scotland.
Talking-up Scotland 
While I sympathise with the boy in question and with his family, it is a single case and is thus anecdotal. What the data you have quoted show is that a substantial and possibly increasing percentage of young people who are referred begin treatment within the target time scale.
What Mr Sarwar and the media do in this and other cases is to generalise from a particular – hence is statement about CAMHS being in crisis.
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