"The current Champions League system does not suit newly promoted teams, as it gives them little chance to compete with the established clubs. The big teams already have the money, players, infrastructure, and everything else, making it almost impossible to beat them. I suggest developing the system to resemble the real-life league format, which would be much better. This would allow smaller clubs to compete and also gain resources."

Problem with real life concept of CL is that have 4 more games, 8 in group stage compare to current 6, and 2 more for teams between 9-24 place, dont think is much space in calendar to fit it

Yes, calender is very full. If you want play CL or CC most easy way is quality for it, be high enough in league to get play it

"Just think about it. If we increase the number of participating teams from 32 to 36, we can then divide them into 6 groups based on strength. Group A would be the strongest, while Group F would be the weakest according to overall ratings. After the division, each team would play one match against a team from every group, making it a total of 6 matches—so the number of games does not increase. If we want, we could add a knockout stage for teams ranked 9th to 24th. And if we don’t want to add extra matches, we can simply let the top 16 teams qualify directly. This way, the total number of games remains the same, but the chances for competition become much greater."

dont understand why group A should be stronger and group F weakest? Greups are created based on elo score which is fair and in sync with real life where club and national coeficient is used.

Not sure why low AQ teams will be prefered in any way? 

What you nothing Saïd is calender. Current calender is full. So when do you want to implantaat this

its unwanted let teams 3 times to play daily