Just Bayern taking their rivals best players and ruining the league. Nothing new.
Thing is, they've been doing that forever (since the 80s when they emerged as the top force in Germany*). But now money dictates the sport like never before and there's no way anyone can stop them. If they don't win the league at any moment, it's due to some glitch and they'll rebound immediately. They always produced top German talent, they still do. Now they're buying everything that breathes in Germany if it doesn't emigrate. In the past players could reject them, now it's naive to do so.
Similar case applies with PSG, who were perfectly timed with the new era we're living in.
We cannot expect sovereign funds or multibillionaires throwing money at football clubs just to have someone else win something.
Unless UEFA and all federations limits what money is allowed to buy in football, this will be the case in these countries. For the time being, money dictates the sport. League winners at all leagues around Europe and Champions League last 16 & quarter finalists show this. Just compare them to the 2000s or even worse, the late 90s [where CL had a similar format at least] and you'll see that this kind of domination existed was mostly due to domestic corruption more often than due to sporting superiority. Now, they're all thrown into the mix, making the whole scene look corrupt even if it's not. And makes corruption appears less effective than it actually is.
* Interesting examples: Lothar Matthaus (Gladbach), Stefan Effenberg (Gladbach), Mehmet Scholl (Karlsruhe), Oliver Kahn (Karlsruhe), Mario Basler (Werder), Jens Jeremies (1860 Munchen), Hasan Salihamidzic (HSV), Ze Roberto (Leverkusen), Michael Ballack (Leverkusen), Lucio (Leverkusen), Miroslav Klose (Werder), Manuel Neuer (Schalke), Robert Lewandowski (Dortmund), Mats Hummels (Dortmund)