Challenge completion numbers

I think some of the amounts required to finish challenges need to be toned down, like the 200m HS kills on recon and repair amounts as examples. Have gotten close to 6k repair in a game once and not even close to 3k repair in a single life. I dont think the challenges themselves are bad but rather that they make me feel uninvolved in the game and will potentially waste multiple amounts of played out games just to not get any progress. Also, hipfire damage with LMG and ADS damage with SMG feels backwards, also 300 suppressions seems a bit challenging and AI-like. Thoughts?