You are losing the track and spouting nonsense which probably suits you better than rest.
If picking wickets in SENA was so easy, why Jadeja bowls less and picks only 2.5 WPM there after leaking runs at same average even though at home, he is picking like 4-5 WPM? Kumble has to do the hard yards due to lack of support and still with the same average in SENA, he picks 4 WPM there. Ashwin and Jadeja are far behind in that. Weren't you giving the excuse of Bhajji supporting him sometime back lol now what?
The question is whether Jadeja is a better test cricket than Kumble, and the answer is yes, he is. This isn't Jadeja against Shane Warne - Kumble had major flaws as a bowler too, the gap in their bowling, if any, isn't enough to cover Jadeja's qualities as a batsman and a fielder.
India don't win/draw half the games they do (many from a potentially perilous position) especially since 2019 or so without Jadeja's contributions with the bat.
If you want to cover the bowling, then yes Kumble has more impressive performances as a bowler alone away from home, yet has a higher average. Jadeja's low WPM away from home, in relation to Kumble specifically, can be explained by the fact that he just isn't needed as a frontline bowler - India have a pace attack they can use and have done so since Ishant became good, Shami and Umesh initially started being useful and then Bumrah and Siraj came into the picture. Kumble bowled more and was the best bowler in the team because our pace attack was ****, ergo he was inevitably going to take more wickets.
As it is, with all his wickets, he didn't actually specifically contribute to any major wins abroad (series), whereas Jadeja jas.
At home, if Kumble was so great, why did India draw/lose so many tests in his lifetime?
I'm not saying Jadeja > Kumble the bowler (though I don't think it's that asinine), I think they're at worst somewhat comparable, at best you could argue Jadeja is better (which is probably wrong, but there is an argument there). Specifically, at home, Jadeja has really outshone Kumble in terms of output and impact (i.e. wins) alone, regardless of what hypothetical parameters you want to put in there ("Jadeja had better bowling tracks etc").
The point is the difference between them isn't insane.
The problem with those hypothetical parameters is that he also averages 40 batting on those same tracks, and about ~45 or more since 2016/2017 when those very specific tracks became absolute minefields allegedly to bat on.
And if you only had to pick one for the side without the rest of the side made up, why would you not pick the better cricket player who will allow you far more options to pick other players while contributing more?