Raveos vs Windows

I just bought a PC for mining. It's supposed to be a brand new machine. It's got 8GB of RAM and a Ryzen processor. I started mining Ravencoin in Windows 10, using the latest NBMiner. After 3 days I had got 12 Ravens. The mining pool is 2miners. About every 8 hours (sporadically) the miner software kept crashing and restarting. I then changed to T-Rex miner and no more crashes. The mining was producing 5.5 Ravencoin per day for 3 days. On the local PC the hashrate hardly changed (even between mining software) but at 2miners the hashrate is extremely volatile: as low as 2.39 MH/s and as high as 16.32 MH/s over 1 hour periods. This has been monitored over a 3 day period. The device is an NVidia GTX 1650 and hasn't been overclocked. I was then advised to consider changing over to raveos. I have done so. Now, only 24 hours has passed so far but guess what? I have earned just over 5.5 Ravencoin and the hashrate is exactly the same: high 16.32 MH/s and low 2.39MH/s. It's just as sporadic as before. My disappointment is about only making 5.5 Ravencoin per day. Minerstat said I should be able to get 14MH/s but I hardly ever get that rate. Internally, (from my a/c with raveos) it Says the rate is the same as in Windows, that is 8MH/s with very little change in the rate. I can't understand why I am only getting 5.5 Ravencoin per day.
Do you think I should mine Firo?