For serious betting, it is always better to wait for at least 5-10 rounds to be played, because in the beginning there can be quite a number of matches that end in very strange results. I generally had the best betting results during October and November, and then after the winter break - then all the cards were more or less open.
Of course, you need to find as much information as possible about the teams, because most people bet just by looking at the names of the clubs - and this is one of the biggest reasons that bookmakers make money and players lose their money.
I noticed weak teams are strong but on getting to the middle, the strong teams at the first five leads are more predictable about the matches they can win, though they can still lose but the chances of strong team losing is at the start of the season.
When you talk about weak teams, it is known that they are very limited by quality players - so as the season progresses they become more tired and some get injured. Substitutions are often not adequate, so such teams simply fall to a lower level with each new game. On the other hand, big clubs compensate for this by not playing all games with the same players, and at the end of the season they usually play in very great form.
Football is, after all, a game in which money still plays the biggest role.