4rahul Thank you for the information that you have kindly provided. With GT Metrix as I mentioned before it doesn't understand that Ezoic lazy loads it's ads in line with Google policies and so the data that it provides isn't accurate or a true reflection of the real readers user experience.
In terms of the dates that you are seeing the bounce rate increasing and the impressions dropping please can you confirm the date range when you are seeing this happening on and the reporting that you are using to track it?
You are of course free to make any changes that you would like to the ads on your site. It's important to note that this will impact your revenue and you may be making these changes unnecessarily. I'm not able to recreate the page speed issues that you are seeing and if page speed insights are saying that everything is fine then it is likely that the issues that you are seeing are either isolated to your device or just happening intermittently in certain circumstances.
As a Publisher you are classed as a super user - someone who isn't impacted by ads and so the AI will always show you the most ads. It's unlikely that your readers are having the same experience as you.
Please let me know the date range where you are seeing the impressions drop and bounce rate increase and the reporting that you are using to track it and I can then happily look into this further for you. many thanks