SARS-CoV-2 virus particles range between 50-200 nanometres in diameter (5e-8 to 2e-7). Farts contain a number of different odorant molecules, including some as small as hydrogen sulfide, which is approximately 200 picometres in diameter (2e-10). That means the virus itself is 2-3 orders of magnitude larger than the smallest molecules that need to get through for a fart to be smelled. More significantly, this is not a virus that can survive in a dry environment, so the only way you're going to see transmission is via water droplets. Those droplets tend to fall in the 5-10 micrometre range (5e-6 to 1e-5), 4-5 orders of magnitude larger than the odorants in your farts.
The fact that you can smell a fart through multiple layers of clothing does not mean that a similar layer of cloth does nothing to prevent the transmission of droplets that are 10,000-100,000 times larger than those odorants. Of course it's not going to be perfect, especially without an airtight seal around the edges (to say nothing of not protecting the eyes), but to suggest that it does nothing is profoundly ignorant of basic biology and math (every number cited here can be found with less than a minute of googling/wikipedia).
To be clear:
* 0.0000000002 m - Smallest fart odorants * 0.00000005 m - Smallest SARS-CoV-2 particles * 0.000005 m - Smallest droplets (required for Covid transmission, are the actual target of masks) Those are very significantly different numbers.
You don't have to enjoy wearing it. Nobody ever really enjoys wearing PPE, regardless of the situation. You should, however, accept that people who very obviously know more about the matter than you are probably right even if your superficial assessment of the matter leads you to doubt. You should also recognize your ignorance, and if your lack of understanding causes you to have questions about the advice of experts, ask those questions instead of spreading misinformation by spouting off your ignorant drivel as though it has any merit. There are plenty of people out there who will be happy to explain it to you without calling you an idiot, but only if you solicit that advice by asking properly instead of by acting like an idiot to attract their attention.
I mean, its pretty impossible to not touch my mask, though. Unless I have psychic powers, that is (Though, I cant use those much due to an incident a while back)...