Inter didn't need much fast attacking playstyle to conquer PSG — that's something PSG excels at. What's very frightening about PSG right now is their midfield. PSG midfield made Liverpool's midfielders look like a joke and even Arsenal midfielders (rice + oddegard) were outworked by PSG's?
A better match up would've been PSG vs Barcelona.
They have a strategic way of cunning their opponents into unbearable areas and place dembele out of the crowd to build up for a strong clap back. Barca's defense is not capable enough to fully withstand this kind of attack and they'll always fall prey to PSG's strategy, yet both teams would score.
PSG winning the champions league title wasn't a surprise to me. I never expected Inter to do so over PSG. If you are a good football analyst, you will understand that in the last season's European competition flight, there were outstandingly 3 well coached teams that participated. They are;
These teams were well coached and any of them would have won the champions league. The reason Arsenal didn't make it beyond the semi finals was the absence of Party in the first leg and more so, Arsenal is known for obeying the law of diminishing return towards the end of every season.
Like seriously, even when Arsenal was beaten home and away, and you are using the first leg as an excuse. The fact is that PSG is better than Arsenal. Not just that, PSG is better than all the clubs that took part in the competition. Amongst all the three clubs that you mentioned, only PSG was able to make to the finals. Let Arsenal win EPL first before we can start looking forward to see them in the Champions League finals.