Maybe things have changed , but right now it looks nicely spaced to me.
In the image below I have darkened the grey border to your posts (but not the ad) so you can easily see where things begin and end.
BTW, are you aware that, at your present rate of visits to the forum, for around £2.50 you can clear the ads for the next 5 years. At that price surely it is worth it? I recognise you feel aggrieved about the way they were introduced, but your messages about the adverts and forum software projects an image of someone who is both embittered and not in complete control of their web site. Won't such an image leave potential customers wondering both how you might handle them as customers and the confidence you have in your suppliers, something of equal concern to the service they get from you.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.