I am Spanish, have lived in a variety of countries including UK (the country that's still home for me), currently in Germany. I have dual nationality, both are EU passports. I keep a close eye on both European and UK news as it affects me, my friends and relatives all over the continent and the isles.
I most certainly don't hate any British people. And I never would due to Brexit unless we count Boris Johnson. I know people who voted both leave and remain, I don't categorise them according to their Brexit preferences. Some of the loveliest people I met in England were leavers. I don't give it a second thought in day-to-day life though. It's as if you told me you were married or single. Couldn't care less.
I don't know of anyone in the EU who genuinely hates British people. What I do find sometimes is an attitude of 'well, can't say they don't deserve X' or 'you can't have your cake and eat it'.
For example when some people complained about the EU Covid passports, and that some countries didn't reciprocate with NHS passes (this goes both ways as the UK didn't recognise EU passes at the beginning). People not realising what they - or those around them - voted for and getting enraged when rule changes affect them. Passport validity, need for visas to work or study, higher cost of importing certain items, border controls, extra tax.
I find some British people just expected for everything to continue like before - to be out of the EU but still benefit from some of the things they offer.
In my line of work it's become much more difficult to work and travel between the UK and the EU, which is something many of us do on a weekly basis sometimes. I'm in performing arts and you need special work permits, passports for the equipment we carry, customs declarations every time you go in and out. You get a call to work in Birmingham tomorrow but you're currently in Austria - not so east to just jump on a plane anymore. There's a lot of paperwork involved. Our accountants are certainly busy.
I do feel sorry for those people who voted remain and are now suffering consequences of Brexit. People whose children won't benefit from school exchanges, students who won't be able to take part in Erasmus. Families who won't be able to visit their relatives with such ease anymore. Those who would've liked to take a gap year and spend a few months working in different countries and learning the culture. It will still be accessible to those with money, but kids from a poorer background won't have it so easy anymore.
I think it's sad that culture and science and many other industries will suffer the effects of Brexit for a while. Highly skilled professionals are looking for work in other countries. If you look at the BBC Proms, they presented an almost 100% British programme this year - the level was so much lower than in previous years. It had nothing to do with Covid because we were touring all over Europe during summer.
At the end of the day the EU isn't perfect either, and both EU and UK have behaved like spoiled children in this. I try not to judge either party by its politicians, my opinions would be very different then.
Some friends' parents who thought all EU immigrants were scroungers who came over for the benefits and to steal their jobs were surprised to learn I had a degree, paid my way and actually contributed to UK society. I think many people with these ideas have never actually had a conversation with an EU immigrant to learn what their life really looks like.