Welcome to my world😊🌍
Site is not playable anymore

Nah, as others said previously, my Internet connection is perfect, Google Internet Speed Test is at the max (fiber).....
Also, it happened to other players way more than usual (in this case I won)

So you are saying chess.com makes you disconnect? 😂 you are just suffering from outages every once in a while.
People keep disconnecting / reconnecting (not voluntarily), and lose games.
I suspect chesscom did another awesome code upgrade ...
One time, I was having really bad internet so I kept lagging but around mid game I lag spiked and when it was fixed it said I lost due to “game abandoned”

Yes, that is because you disconnected the game for over a minute which counts as abandonment. One of the best rules in chess.com, so when sore losers quit the game, you dont have to wait for them.

Never had disconnects on lichess for example
Had disconnects on chess.com almost every day with pretty long time needed to get back
Disconnecting is solely your fault, not chess,com
Well in that case that I mentioned it wasn’t my fault because I was experiencing very bad internet. Plus, I never put the blame on chess.com

The way you can tell the problem is not server- side is that it's not affecting everyone... and no, it doesn't matter that you can always find others with the same issue. And no, it doesn't mean anything that you don't disconnect from other sites: Unlike many websites that use cached pages or non-real-time services, Chess.com requires a constant, accurate, and low-latency connection for live games.
People keep disconnecting / reconnecting (not voluntarily), and lose games.
I suspect chesscom did another awesome code upgrade ...