If you block the ad, the budget is assigned to another person and both FB and the advertiser benefit from you blocking it.
The best way to harm the ad is actually to interact with it (click the ad, or like and unlike it) so that FB registers your “interest” and keeps showing it to you rather than somebody else that could actually be influenced by it. Bonus : you’ll get other similar ads that you can also manipulate the same way.
Also this is absolutely not what ticks and bed bugs look like 🤷♀️