You rarely play a matchmaking game in CS:GO without meeting someone who is acting childishly. It’s difficult to avoid but it is not impossible. If you tend to be toxic or grief a lot then you have a higher chance of meeting people who are toxic and griefing as well. That’s how the Trust Factor in CS:GO works.
To get a higher Trust Factor you need to stop being toxic in both the voice and text chat.
You also need to behave better and don’t grief which includes not blocking people, giving away information, dying, and losing on purpose.
Be a good teammate and you’ll see changes coming your way. But be patient. The Trust Factor does not change overnight.