If you really want to win at betting on sports or etc. You should know how to observe and be measure things. First look at the different statistics of each teams and find their strengths and weaknesses for you to be able to know if the team you are choosing has the potential to win against their opponent.
If you look at the Tier 1 and 2 teams the odds should be pretty fair and will give you a good indication on who will likely win. There are so many people looking at the big teams like PSG for example that I it will be very hard to find thing that everyone else missed. Since the football matches are back during the pandemic I started to bet only on fairly sure games where the risk of losing is fairly low. Sure the winning are low too but it's better than to lose money at the moment.
We are not going to see different tier teams competing each other too often so it is not going to work for someone who are interested on betting regularly.But it is also easier to analyse if the odds are pretty low and not much people gonna bet on such games the real betting begins only with to head to head rivals plays and also lot of manipulation may get involved.