Do I have a memory issue?
If you look closely at SpBlitz memory recommendations it says it has two possible meanings


  Memory Dangerously Low or Max Memory Too High


In your case looking at perfmon counters output you have shared their does not seems to be a memory pressure. So we are left with the fact that max server memory is configured incorrectly. And this seems true, on a system having 32 G memory you have given 30 G to SQL Server this would definitely leave OS fighting for more memory.

In this case OS will start paging out SQL Server processes to disk making it very slow. Or if Locked pages in memory is there for SQL Server service account OS process would be paged to disk. Both these conditions are very bad for SQL Server and OS.

I suggest you take help from This SE thread to calculate appropriate value for max server memory. I have given answer on this thread which asks user to take help of perfmon counters to reach to a sensible value.

You can start by giving 27 G to SQL Server and leaving 5G for OS. Then use perfmon counters mentioned in SE thread to reach to sensible value.

EDIT: I forgot to ask you to apply SQL Server 2008 R2 SP3, currently SQL Server is on SP2. This is must if you need extended support. In any case, to be on safer side you should always make sure SQL Server is patched to latest service pack.