And Russia is also a superpower, and we don't want to be in conflict with them. So yeah it's not that everything they say we should abide to, but we should also not think that we can do everything without upsetting them.
https://en.m.wikipedia.org/wiki/2008_Bucharest_summit
Note that Georgia joining was also on the table. Several months after this summit Russia trounced Georgia in a few days and since then there has been no serious movement towards joining NATO.
Russia likely expected the same outcome in Ukraine but as we know now that didn't materialize.
There's also Putin's 2007 speech in Munich about them being really pissed with how they are treated, does that count? Other than that there's the second Chechen war and maybe the time the Russians rushed some peace keepers into Kosoy.