Under Root's captaincy, England lost the away series to India 1-3 in February-March this year, which was followed by a 0-1 home loss to New Zealand in the two-Test series.
Chappell pointed out England's batting as a point of concern while signalling their bowling as a strength.
The 78-year-old said the shortest format of the game lacks the right balance.
Chappell said that non-traditional cricket-playing countries were more interested in the T20 format because the cost of producing Test venues and players was prohibitive.
Chappell personally chose three potential backups for India Vice-Captain Ajinkya Rahane in Tests, who has been out of his mojo since the Australia series. Rahane averages just 19.57 in the year 2021 with only two half-centuries to his credit.
Ian Chappell also said that is a scary prospect for oppositions.
The 39-year-old Anderson orchestrated Indian batting collapse as the visitors were all out for 78 in the first innings of the third Test at Headingley.
The former Australian captain, one of the game's biggest analysts for many years now, believes India has been well served by fast bowlers such as Mohammed Shami, Ishant Sharma, Jasprit Bumrah and Mohammed Siraj.
Ian Chappell said that England have a world-class pace attack but their major concerns are top-order batting and Root's captaincy
Manjrekar claimed that according to him Ashwin is not in the category of all-time greats as he doesn't have an extraordinary record in SENA countries.