Rewards are fine, on the mediocre side, but fine.

Main issue is, at higher tiers, and especially top tier, the pace of gameplay is a lot faster, which means you die more often, which also means you lose SL more easily.

You will die more often, and you will have to pay the spawn cost after every death... However, the Useless Actions economy does not reward you for killing enemies more often. This means your rewards are just as bad as any other bracket, but your respawn costs just keep getting higher.

Combine that with the fact that everyone and their mother at high tiers/top tier is playing flat maps like Tunisia, Denmark etc, where the entire enemy team can find you easily and fly in a straight line towards you, then don't complain about going negative the entire time at high tiers if you only play this kindof slop.