I've never chased any of those myself, but someone who reported those same warnings
out of Google Search Console actually did have things "wrong" with their site's style templates. Advertisement links had been introduced, and there was advertisement-related text which had explicit fonts and non-friendly spacing applied rather than following the CSS of the site, as well as text which had ended up outside the body tag entirely.
Unfortunately, Google Search Console's report of these "issues" takes the asinine approach of refusing to tell you where or in response to what elements of the page it's generating these warnings. And in some cases, when you manually test the same page, there is no issue. So no one except Google actually knows what they were reacting to.
If we're talking about https://russian-mosin-nagant-forum.com/
, the extra menu bar below the banner and the advertisements before the forum list look the most suspicious to me. But again, we have no idea what Google is actually
citing, and only talking to Google could give you a definitive answer.
But as you can see in the screen shot, the menu bar is overflowing on mobile and not controlling it's display. And the advertisement images are overlapped, which is potentially the "clickable elements too close together." The advertisement and facebook link area seems to only be using non-breaking spaces to control display, which would be non-deterministic. For example the facebook icon has no margin, and ends up with no space between it and any other button or email text link that ends up above or below it.
This is the view I get telling Chrome's F12 tools view to emulate an iPhone 8. Once you make corrections or replace your menu bar and advertisement area with something mobile-friendly, you can test this way to see the results and whether you think there are remaining issues.