How is that different from what your own government does with the taxes you paid? They also take your money and spend it on infrastructure, projects or social support that you might or might not want to/need to use.
The difference is that, first, you get 100% back and not 50% (a tiny detail...), and second, you elect UK government and MPs... you don't elect the "Commissioners" in Brussels, you can decide what and where to spend money on.
But if you have no problem with that then contact me by email, for your own good, i'd suggest that your spending go through me first, give me your money and I'll fund you in the "optimal" way, for your own good. ;)
The difference is the weird branding issue. It's as though implying 'The EU did this!' when really it was local taxpayers who did, in fact, they've likely overpaid as services will disproportionately go to poor countries.
I think it's fair on some level, but should be commensurate with the activity.
Towns should not be forced to fly an EU flab 'because some fund'.
If a highway in Poland is built with EU funds, then it's very fair to have ample signage indicating that.
Or of the vaccines are paid for by the EU, then the vaccine rollout should make that very clear. That's fair.
But if you have no problem with that then contact me by email, for your own good, i'd suggest that your spending go through me first, give me your money and I'll fund you in the "optimal" way, for your own good. ;)