I live in (around) a major city. Sure it's overcrowded but that has nothing to do with foreign immigration and everything to do about it being a economic powerhouse. Quality of life has been increasing since the city has invested/is investing in more transportation/bikeable lanes/better air pollution standards/less noise. Also laws that are forcing better insulation standards are a net quality of life both in terms of comfort and footing the bill. Even the people who really need to take their cars will benefit because there will less traffic jams on account of 1. people for whom it was mostly comfort leaving the road and 2. reduced speed means less unnecessary braking to get out and in the motorway around the city.
Strained services seems to be because of budget tightening. It's a policy choice that has to do with ideology (don't fund a service when it could made profitable by outsourcing it) and trying to save on budgets because of a bad economy. Again you'd have to back up with data that it has something to do with immigration.
I could on and on but basically what you are saying there was too much new people too fast but I don't think this is nowhere true in my western european country.
The only thing that could worry is the minorities enclaves but it's not hard to break up a ghetto by opening it up sociogeographically and economically, you just need to the political will to do so but instead it's left in place and used as convenient fear-mongering tool for politicians.