There could be a very simple and correctable solution, or it could something that requires a little more time and energy to get to the bottom of.
Are you being overly critical when you comment or make a suggestion? people tend to be repelled by negativity, if you are constantly criticizing or being negative your suggestions may get rejected due to your negative tone or wording.
Possible reasons why no one listens to you.
What is your intention?
What I mean is what is your intention when you open your mouth? are you actually trying to be helpful and constructive or is there an underlying meaning. For example are you simply looking for attention? are you looking for an ego boost? or are you trying to put somebody down? it maybe a combination of these things.
People can pick up on your real intentions, so if they think you are just trying to make yourself look good they will be less likely to take your comments seriously.
Are you listening?
Sometimes we get carried away trying to share our own thoughts and we often don’t listen to other people and their feedback.
If you don’t listen to other people they are unlikely to listen to you simply out of spite. This goes back to an old saying. Treat others how you wish to be treated.
Also not paying attention to feedback can make you seem, arrogant, closed minded and even deluded which can cause people to lose confidence in you.
How is your tone of voice?
Your voice tone gives away a lot. It can make you seem aggressive and confrontational which could make a situation and people around you uncomfortable therefore less likely to want to pay attention to you. It can also make you seem none assertive and your ideas may simply be overlooked due to your lack of conviction in expressing them. The wrong voice tone can even project a lack of confidence in your own ideas and if you don’t show confidence in your own ideas then others are unlikely to have confidence in them either.
This is pretty much the same as voice tone. You can project yourself positively and negatively, with or without confidence by using your body language.
Are you being rude or condescending not treating people with respect, you can put people on the defensive. If people are being defensive they will be focusing their energies on dealing with that, or thinking of ways to attack you back, instead of listening to you and any ideas you may have.
What to do now?
Self awareness is almost always the best place to start and this is no exception. Do any of the above reasons apply to you? you may have to think hard to determine if they do.
Once you think you know why people are not listening to you it may only be a minor change in the way you deal with people to make a big impact.