I expect you to be able to evidence your claims, yes. Considering how absolute you are in your responses I'd have thought you'd have plenty to hand and just stating something is a fact doesn't make it so.
But no worries, lets look at the one of the most beloved anti-EU myths, the 'bendy banana' law. Brexiteers loved to use this as an example of the EUs overreach and bureaucracy gone mad. Only problem with this narrative is that it's entirely false.
Directive 2257/94, to give it its real name, was a regulation regarding the classification of bananas and had nothing to do with banning the sale of them.
The directive was developed, reviewed and adopted with full participation of the UK's EU representatives and widely supported by UK banana importers at the time as they had historic links to Caribbean banana producers.
This directive helped them compete on quality and consistency, provided a more level / fair route into the EU market and streamlined trade with them, and (probably most importantly in their eyes) allowed producers / importers / retailers to command a higher price for those Caribbean grown bananas.
But for the anti-EU brigade reality is irrelevant and it will also been known as the EU trying to ban bendy bananas. But if you've got any actual examples of the EU dictating rules to us that were too our detriment I'd love to here them.