twitch is a platform that changed the way of entertainment. Million of person watch real life situations, observing what the streamer does in every moment. And for this, every second count, because you cannot watch it again (technically you can, but if a want to see something recorded I will go to another platform)
Understanding this situation, Twitch cannot use the traditional way of showing ads as the TV or other videos platform does, because the platform works different!
So my suggestion is that Twitch must improve with a creative and different mechanisim of showing ads, creating more engagement with the audience and taking of the frustation of the viewer while they are missing out the transmition.
I dont want to blind yourself with a solution, but I can help you leading the brainstorming if you need haha (its part of my current job😂)