Your competitors are sending you fraudulent clicks and about this, there is NOTHING you can do, except slightly reducing these fraudulant clicks, through some campaign related changes / tweaks. For more insights, see https://www.blackhatworld.com/seo/is-bing-selling-fake-clicks.1447717/#post-15762387 , https://www.blackhatworld.com/seo/how-to-prevent-fraud-click-from-competition.1333191/#post-14936213 and https://www.blackhatworld.com/seo/defence-against-ad-bots.1484027/#post-16223553.
Another thing you possibly can do is analyse these fraudulent clicks, prepare a detailed report and submit it to Google Ads support and then pray that you get some credits for it.
And if these are not fraudulent clicks, then you need to seriously analyse your campaign setup, especially the keywords, geos targetted, etc. It could be that your targeting is so broad that it also attracts people (audience) that are not interested / not looking for what you are advertising.