I feel bad for you RayTheTiler.
I don't work as a tiler (as my only other thread on this forum will very clearly show). When I was working full time though, the company I worked for paid us minimum wage whilst they charged clients £600 per day for our work. They did this because they knew if we complained or quit they could easily fill our positions with eager, younger workers who didn't have families to support or mortgages etc. It didn't feel great, so I sympathise with you.
I imagine if I was you, I would be rightly pissed off about losing those jobs and I would probably vote for anyone who told me they could stop it happening again. It probably doesn't make you feel any better knowing that EU migrants contribute more than they take. Because you directly lost out.
However, I just hope that you'd agree that there
could be a wider picture. Some people like you will directly lose out. But (if you believe the statistics) many more people will benefit in terms of the wider contribution they make to UK economy. (Their taxes also going towards hospitals, schools, roads etc and presumably money they earn being at least partly spent in shops, pubs supermarkets here).
Looking at the issue with a wider lens the numbers seem (to me at least) to show that our country will be worse off if we leave.
PS I don't know much about academics and EU grants for uni's. But I did learn that foreign students who come here to study contribute £2.3 billion a year to the UK economy (and that's just the ones studying in London).
Overseas students contribute £2.3bn a year to UK, says study - FT.com
They do this presumably because we have world class universities. So I reckon those EU grants are worth it!