You are free to have your opinion whatever that may be
You really don't have to feel sorry or believe that Viv is great. As one poster said correctly Viv is over-rated by people who were not fortunate to see him bat live. My guess is, you never saw him bat, outside of youtube videos. Since you used Viv's stats (filtered by opposition) to support the fact that he is over-rated, my point was to show you that Sachin (someone whom you most definitely don't consider over-rated) stats, filtered by the opposing bowler in my case, can be used to support similar claims.
Ultimately it depends on what creates the strongest impression in your mind. Like you, it would most likely be Sachin's batting for most Indians. So for you and most Indians it is the Holy Grail. Since I grew up watching cricket during the golden era of fast bowling (late 70s to early 90s), hostile pace bowling created the strongest impression in my mind.
Lillee-Thommo flattening everyone including English and Windies batting line-ups in the mid-70s was some sight. It was pitiful to see a terrified Bishen Singh Bedi (with a strong batting line-up of Gavaskar, Gaekwad, Amarnath, Vengsarkar, Vishwanath etc.) declare his side at some 90+ runs for 5 wickets down in Jamaica for the sheer fear of facing the West Indian pacemen (who were bowling bouncers and occasional beamers) in their 1976 Test series. Similarly, it was appalling to see a super-tough Aussie batting line-up (Boon, Marsh, Dean Jones, Border, Steve Waugh, Healy etc.) being pulverized into submission on an MCG pitch with uneven bounce by Patterson, Ambrose and Marshall in their 88-89 series. The Australian side was a heap of broken bodies at the end of the MCG match. They managed to score 114 and it took every ounce of their courage and skill.
Test cricket, back then, was a completely different sport, a completely different challenge, compared to what it is now. Getting back from the ground in one piece was as big, if not bigger, a priority as keeping your wicket.
For these reasons, I can't appreciate Viv enough for opening the batting against Lillee+Thommo in the latter half of the 75-76 series and then carting them all over the ground, and this despite Viv being a regular middle-order batsman (he had to open partly because opener Greenidge's confidence was annhilated by the ferocity of the pacemen). It requires an astonishing degree of courage and skill to do that. No wonder several cricketers including Imran, Lillee,
Botham rate Viv as the greatest. Again, it is their subjective opinion
.