Nexus 3.69 OSS - does going over the daily requests threshold cause slowness?

We are on Sonatype Nexus 3.69 OSS repository where the daily requests are over 3 times the 20000 limit per day and total number of components are well over 100000 limit too.

Can this cause slowness in artifact downloads during maven builds?

We are seeing significant slowness in maven builds but it is not consistent - it happens only few times a month.
We have already looked at the instance level, network level but didn’t find any bottlenecks - so, want to check if the slowness is originating from Nexus itself.