Gaming. Bad performance by Amazon and Netflix?

Have the following problem. If I gamble while looking at Netflix, for example, I have bad performance problems (again and again micro-stuttering). Funnily enough, it does not happen on YouTube or Twitch, just stream it on the show. Same with absolute offline games.
Does anyone have the same problem or possibly a solution?

When it comes to online gaming, it is clearly the available bandwidth. As e.g. Netflix needs more data than YouTube, you're stuck with a smaller performance.

With Offlinegaming the question arises, whether you do this at the same terminal. So, for example A PC with several monitors. If so, it could be due to the memory of your device.

Use different systems. So not both at the same time on the PC, but gaming on the PC and Netflix on TV / PlayStation / Apple TV / Amazon TV Stick

I join in total failure. In addition, it may have to do with poor cooling of the components.

It may well be that Netflix and Amazon Prime use the video card for decoding, but YouTube and Twitch only use the main processor.

If the graphics card runs out of memory, it can lead to such problems.

Have the problem since I had to switch from the old Firefox to the new Quantum. But my PC is also old, but still. None of my programs lame my PC like Firefox after a while. (Use again Chrome since it is not so blatant)