Liverpool bought Virgil van Dijk for 75 million and Robertson for 7 million and their defense is strong and solid. City has Laporte stones Mangala Walker Mendy Angelino etc. And their defense is still not the best and they are going for koulibaly to strengthen their defense. Obviously, buying and buying isn't working and a change in managerial or coach's must be in order too.
They used to struggle in the championship, and now they have the second-best defense in the league, sure it could be better but it is not best at the moment, maybe doesn’t reach the standards but they still have good defense.
I've seen a bit, and yes it's been miles worse but back then years ago they were all around poor, now they have a great attack, a Ferrari of midfield, but the defense doesn't pull enough weight when it matters. For the size of their club right now they need to be great all over the field, and yes it's a great defense when you compare to an average mid-table side but they need to be great against the big teams too. The reason they can't get past the quarters is down to how their coaches work with the defense, and they are doing a poor job quite frankly.
Great one