That (and the Guardian summary below) is actually quite a damning report - and given that it was by the French Senate effectively about a fellow national organisation - quite impressive in it's complete lack of whitewash. Heartening that not all those above us are corrupt numpties - which is...
Uefa issue an apology https://www.bbc.co.uk/sport/football/61686639
Real Madrid also complained of issues https://www.realmadrid.com/en/news/2022/06/03/official-announcement?utm_source=twitter&utm_medium=social&utm_campaign=organico
https://www.theguardian.com/football/2022/may/31/number-of-fake-liverpool-champions-league-final-tickets-was-just-2800
2,800 tickets found to be 'fake' at turnstiles. Or non-fakes with scanning issues.
That whole article and the interview seem to quite reasonably explain the situation. One train line shut, so everyone had to come from one station, narrow bottlenecks funnelling fans, extra checking of tickets because of the prior knowledge that there may be ticketless fans / counterfeit...