Just defeated “Mom” the first time and what the f was that run

Bought the game in the sale, decided to play the game with ZERO clue what to do.
First few runs were like what the fuck am I supposed to do, next few runs went a little far like 2nd or even 3rd room once, never got anything special, ass loot no coins no keys, and most bears I ever had were like 4
Next run I don’t even know what the fuck was happening anymore, got the shielded tear early, already found out it’s pretty good, and that’s pretty much all I knew about the run, I went into a BUNCH of those pain rooms, apparently people say it’s not worth it but I just kept getting good stuff and at the end I was like shitting on enemies
I was throwing like RGB tears I was so large for some reason and my character looked like an amalgamation of “things”
Enemies would explode, freeze shrink and idk some turned into shit that would die and throw stuff at enemies, I was at like 10 heats at the end of the run and boss fights took like seconds and idk what mom even was it was like a leg and random bullshit I don’t even know how I killed I don’t know what i was doing the whole run and killed everything anyways what was that I wasn’t even trying to do anything.

How am I supposed to know stuff