So you don't miss ads, you miss a scheduled break. You literally said you walk away when they happened, so you didn't even see them.
That's fine and there are tools to get that scheduled break back - even the official YouTube app has options to remind you to take a break every X min of watchtime and there are some very advanced general screentime limiting apps out there.
As you say YouTube ads aren't scheduled well and they're too short and unpredictable to even go to the bathroom during. Integrated ad reads are even worse in that regard.