Every day, I pass by numerous signs and plaques reading "funded by EU funds." Most of the time, they are attached to public transport or road infrastructure. For anyone genuinely trying to understand the EU's impact — rather than just defaulting to blind hatred — there are plenty of public resources available. You can find maps and project lists detailing descriptions, funding amounts, and progress statuses.
Granted, this data is usually "boring" by today’s dopamine-driven attention standards, so it's no wonder people rarely talk about it. But if you actually stop and take an interest in what has been accomplished, you start noticing the impact everywhere—it just takes a little effort. After all, how hyped can you really get over a repaved road in some remote village you've never even heard of? You can't. But the people living there certainly feel the impact, even if they don't always notice where the money came from.
Go search for maps provided by EU or your government sites, for instance https://mapadotacji.gov.pl/?lang=en
You might disagree with certain aspects of the EU, but leaving a rage-baited, hateful comment is the easy way out. Looking at actual accomplishments—despite your frustrations—takes real effort.
For stuff which actually can matter and had impact on daily lives (beside aforementioned public transport impact):
- USB-C as a standard power connector
- hassle-free travel between countries
- GDPR you mentioned
- recent "stop killing games" public initiative which shows that common people can stand a chance against multimillion dollar companies
- abolition of roaming charges and access to a free internet up to certain limits — huge PITA solved for people going on vacations
- universal healthcare between countries on vacations
- strong 14 day guarantee for online purchases, free return policies and minimum 2 year warranty
- food safety regulations (but if you don't care you won't be impressed by it)
- certain regulations regarding flights and passenger rights (cancellation compensation, recent regulations regarding baggage, to fight with scammy practices of flight operators)
- right to repair
- even the commonly memed bottle caps is nice UX — you (or more commonly a kid) won't be able to drop a cap on sand rendering :) And thanks to that there is noticeably less "small trash" on beaches and in parks (left to solve are beer caps ;)