It is a well-known thing that browser adblockers often fail to play nicely with YouTube these days. However, even if you paid for Premium Lite, Google says it will soon push even more ads.
I would of if there was a family tier that plays YouTube without ads in my country. The content I watch is good and authors deserve payment IMO. Sadly there is currently no competition, there are some marginal subscription services and there is peertube which doesn't have monetization.
If it was only few seconds. At best you can skip after 5s but then you get plenty of 15-50s ads every 5+ minutes or so with some videos. It makes it almost impossible to watch it.