Phil, there could be all sorts of reasons for your perception that people are being more critical of you than of yore.

1. Your voice has changed.
2. The ones who complimented you previously weren't being honest...
3. The ones who criticise you currently aren't being honest...

It's quite possible that, over ten or so years, you've started singing to a wider and more varied audience - the wider and larger the audience, the more varied the comments.

Such is life.

As others have said, if you have self-doubts because of this, sing to someone who can be a helpful critic and get a reasonably unbiased opinion from an experienced stranger.