A worrying choice of words.

"Losing sleep" implies an actual problem, which in turn implies that the mentioned mitigations and similar ones have not been applied (at least not properly) for dire reasons that are likely to be a more important problem than bad QoS.

"Infrastructure" implies an expectation that you deploy something external to the troubled application: there is a defective, presumably simplistic application architecture, and fixing it is not an option. This puts you in an awkward position: someone else is incompetent or unreasonable, but the responsibility for keeping their dumpster fire running falls on you.