Ryzen 5 Overclocking problem

So first,
here is information you are looking for, https://forum-en.msi.com/index.php?topic=286610.0
i'm not familiar with MSI product or how their bios works so i can't say it with certainty.

LLC is the Load Line Calibration it basically gives your system a higher output of consistent voltage or.. "Cleaner line of voltage"
in results into more stability in power delivery, this is the easy way to say it and make people understand it so i'll keep it to that.
obviously there is more going on but its irrelevant.

For overclockers this means always set it To maximum it can handle or close to maximum.

The basic idea with overclocking is always based upon trial and error.
Set CPU Voltage core what is should be able to handle at most so like 1.4 volts but you'll notice your system overheats Very quickly and shuts down instantly (especially on stock cooling) Then you are forced to decrease the volts and you figure out how much volts your cpu can handle under max load.
once you figured this out you start to increase the clocks up to amount system instability occurs then lower the clocks until you receive stability.
LLC is one of those steps to decrease the amount of surge drops once a motherboard/cpu component is on idle and utilises less power but once that component requires additional power/volts again your system crashes or shuts down instantly because at that nanosecond your system didn't have enough power.
But also keep in mind that it works the other way around too component are constantly being given more power so their lifespan gets reduced.

once you have managed to find the right voltages and clock speed then you can work on memory overclocking to even gain more performance even on Cpu since Ryzen's architecture works that way.
All this information is easy to find over the internet.
Sadly i don't have experience with any Msi Motherboards so i don't know about their labelling or terminology within the bios.
Sometimes this does differ from brand to brand so i'm afraid i can't help you beyond giving you this information.

Ideally... Idle temps should look like 25'c ~ 35'c
Under stress test loads 65'c~75'c anything beyond this should give instability anyways unless you have a really good custom water loop you might get away with little above 75 ish Celsius.

Most people would say 80 is max but i'd highly avoid that.. i haven't seen or gotten stable system near max temps.
Stock cooling i'd highly recommend not going above 1.33000 volts because your cooler also spreads the heat onto the rest of the components of the motherboard and they too can overheat.
Stock coolers blows the hot air from cpu directly on top of the motherboard Aio's are proper solution to this because they move the heat to the radiator and then blow it out.

things that are very important for overclocking is the motherboard's components too. if the VRM can handle the voltages or not... if they build up like Gigabyte's boards do they go over 125'c (so i have heard) it shuts down to protect its components (see here: https://www.youtube.com/watch?v=vjbzTHcaHO0)

Then also comes the power supply... how much can it handle how well build is it? the Watt-ages it can support isn't even that important but its the way how pure of the amount of voltages it can deliver.

And then there is the Silicon lottery as everyone calls it.
how bad of a binned chip you bought... Basically... a silicone slate is created and they cut out certain amount of chips out of each slate...
they get tested... and the ones that function 100% are called 1800x's if they don't clock as good as their baseline their called 1800's.
and if their worse then those they'll call them 1700x's if some cores don't even function they get laser them out "aka Disabled" and they get lower graded like 1600x or 1600,1500x,1500,1400 etc.. etc..

so its no surprise that a 1400 can't clock as good as a 1800x/1800
So just keep that in mind.

So.
1. increase volts and bench system to see how much voltages your system can handle before heat becomes a issue.
1a. Also increase things that automatically increase more power delivery like LLC & SOC.

2. increase cpu clocks and benchmark your system until all the instability is gone and you get a "stable" overclock.
2a. Make sure to run a 4hour run of Full stress test or overnight.. with something like Prime95.

3. increase memory overclocking set timing correct, check what die's are on the chips look at their rated clocks speeds try increasing volts etc.. etc..
3a. You'll have to do extensive research on all the information from the manufacturers.
3b. or have the right tools like a "thaiphoon" to find a majority of this information for you.
3c. Memtest86 to bench, check for errors or instability.

4. Make sure you optimise windows as well by setting power to high performance.
4a. you can leave it at that and say you overclocked.. or... you could gain more performances by entering Windows services and disabling 10~100 services that you do not require to run like Printer spooler service...

all by all.. this is a learning curve... and things to tune/tweak/overclock takes time and effort.
but in total... this could net you from 1~40% performance increase all these steps at least if you do it right.
in this case Google is your friend.

sorry for the long post but i hope this will net you enough information to find your solution.