My experience is a different one:
"it wasn't really fun to watch them."
Actually, I found the match to be more interesting to watch. Unlike the Magnus games, in the Ding-Gukesh match the outcome wasn't clear. Besides, they played a lot of different openings (even the French) which in my opinion was more fun than watching the Berlin or the Petroff game after game.
"And after Magnus said that he withdraws from being the World Champion, chess started getting boring"
I hear you. But that's just a phase. After Kaparov lost to Kramnik there was also a decade with several players (Anand, Kramnik, Topalov) being equally strong... Wait a few more years and one of these Indian kids will emerge as the clear #1.
"everything is getting faster, most people aren't patient enough to watch the whole classic game, so I think Chess could also get a little faster and rapid could become the main time control."
The WC still generated more interest than other formats. And there are already plenty of rapid and blitz events.
"As a professional, it's not boring for me to watch classic chess, because I can see what they're trying to do,"
Uhm... Professional? According to your FIDE page you're rated 1550, no?
I still like chess.