To guys, when a girl buys you an expensive gift?

I gave him a gift and it's a bit expensive when you look it up on Google (but I bought it on sale so...). He didn't thank me or told me he was happy about the gift. He just told me, "You're so generous." And I felt a bit down because I thought he'll be glad about it. ): He mentioned earlier this year that he really really wanted to have something like this, so I decided to buy it for him on his birthday. Do guys hate it when girls give them expensive gifts?
To guys, when a girl buys you an expensive gift?
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