The last thing Putin wants is a country with a lot of relatives of Russians getting the EU treatment and finding out how nice it is to be out of their largely lawless, virtual dictatorship of a state.
You should update your propaganda-driven beliefs. I've got a russian girlfriend and I've been to Russia myself. At least for where I was (St. Petersburg), it looks much like any european city, except more beautiful (but that's a St. Petersburg special, they made very sure to keep all the old palaces and buildings in shape).
Crime was horrible in the 1990s, my girlfriend says, but here's why most russians actually love Putin: Since he became the top dog, things have been continuously improving. Crime is low, economy is good, of course nothing is perfect, but compared to previous times, they're pretty great.
From what I've seen in daily life, I don't see anything that would make them jealous of a random EU member country. Supermarkets are full of basically the same products I can buy here, everyone has a car, public transport is better than in some european cities, the streets are in good condition and clean, I felt safe both at day and at night.
Of course Putin doesn't want Ukraine to join the EU. But that they will all be able to suddenly buy bananas and thus run away from communism is 1990s stuff and long since outdated.