The Eight of Pentacles suggests Matthew may have a personal interest and a secret plan. He might also be interested in something that isn't clear or visible at first glance. This may mean that there is something he is keeping under wraps or not fully disclosing, and your intuition that you don't trust him is justified.
The Ten of Swords shows that there may be an unfortunate situation with Matteo where something went wrong. He also indicates that there may be circumstances or people who are not on your side or are putting you in a difficult position. This card suggests that you carefully consider how to protect yourself from any bias or manipulation by Matthew.
Finally, the reversed Knight of Wands indicates that Matthew may be trying to leverage your trust in pursuit of his personal goals. This means that he may present his ideas about him convincingly but for selfish intentions. This card suggests to be aware of his agenda and not to be deceived by him.
In conclusion, the cards seem to suggest that you are right not to trust Matthew and that he has bad intentions. However, you should remain vigilant and pay attention to his actions, so as not to be deceived by him or suffer any prejudices.