Slaughter or get slaughtered

There doesn’t seem to be any fine line with the MM system, very few matches do I seem to go somewhat even in K/D, at times everything seems to work as a well fined machinery where there are few issues with anything and I do manage to go positive, in some cases even doing extremely well. Other times the game seems to be working against me, where not only does things hiccup ( normal desynch issues with hit registration, grenades being duds and melee not registering as a back smack despite being an obvious one
which seems to have increased in frequency), but the enemy team is way above my league and I get melted going around basically any corner.

Is this the way it’s supposed to be going forward?
Slaughter or get slaughtered? The latter which happens more frequently because the game won’t register anything damage wise at times.