Why is smash online a joke?

Im not even mad at this point I’m just disappointed… I’m disappointed that Nintendo let there game turn to shit years ago and never decided to fix it. Online is a laggy mess and it always feels like its targeting me like the game picks favorites and in its worst enemy or something. I will be playing and the way we are playing will make it look like I’m a tournament player I’ll be doing combos i would juggle them I’d even read there every move but no since they are playing a DLC character with super lag in there favor they get the free win… I was playing DK and I was getting hit by tilts and I would die but when I play against another DK my smash attacks act like jabs it’s so confusing. I remember playing Dr Mario and doing his down b REALLY close to the edge and they still don’t die even if it’s a light or mid weight character but right how I was playing Mario and I got hit by a Dr Mario down b at the MIDDLE of a stage and I still die… it doesn’t make sense how I can be destroying a player so bad but then they hit me once and it’s game over. It’s like they have a move where if you just press a button GOD will come down and take your life away for free AND the player is invisible for the first 10 frames and it acts like a counter on top of that… and ofc right as I was gonna win my controller had to like bug out and for some reason I went home and clicked on another games information or something like what the actual fuck you seriously can not make this shit up like I’m already expecting people to just be saying “don’t lie just take the loss” “skill issue” “don’t exaggerate” bro I know for a fact those are the same people that are cheating with a lag switch or something or even worse the people who have this happen to them so they join a discord server to play with real people… cuz Ik all those fucks on quick play are no life’s that have no love so they think they will have fun cheating or taking advantage of the bad connection like at this point I’m just sad that this is what the game has come to seriously