You can still win the championship. Leicester and Atletico Madrid have proven it. But in the Champions League, money comes first. But money without a smart coach and manager may not help much.
I even think the opposite way ..
It's much easier to win trophies in domestic championship rather with the money in hands rather than international championship like Europa League or Champions League.
Manchester City and PSG both struggling to get this trophy no matter how much money they have spent , it's really competitive especially there's real madrid who undoubtedly have been there spending a lot of money every year building their empire and been stable financially for ages.
This canceled newcastle takeover thing just saved the whole modern football from a disaster , yeah it's safe to say things could be crazy with the king of all arab money acquired premier league team... no more fun when money wins everything