the definition of the word "outperform" is defined as "to perform better than"

if you are watching a basketball game, how could you judge when a player outperforms another? you could look at how many points they score. you could look at how many times they steal the ball. you could look at how many times they block the ball. there are various metrics you can use to determine that

now lets go back to guns in escape from tarkov. some of the metrics you can look at for comparison are recoil or weight or damage or penetration. theres tons of them. one of these metrics is "can the gun equip a pso scope?". and in that competition, the svd has a value of "true" while the m1a and sa58 have a value of "false". therefore, the svd has outperformed those guns in this way. therefore your sentence of "the SVD is outperformed by M1A and SA58 in every possible way" is false because i just gave you a metric in which the SVD does out perform those other 2 guns

its very straightforward logic and proof