The best way to gauge if your content sucks is dislikes. If you get a fair few dislikes then people don't really like your content. That said the occasional is more than likley just trolls from channels that are smaller than yours. That being said, your content most definitely does not suck. If your content was a vacuum cleaner, I would have to take it back to get fixed with the amount of not sucking it does. In conclusion, don't use a vacuum cleaner as a metaphor for your content.