But I was wondering if the higher size of the bankroll could affect whether we could be more lucky.
No, bet size has no effect on your winning probability.
My point is that the more other players lose, then the house grows and theoretically the probability (so our luck) that we will win is higher, am i right?
It doesn't work that way. It is called "Gambler Fallacy" or i'd like to say "Slotsception" lol
The result is independent and random, so a player with godlike luck like @roycilik can get "sensational win" quite often, while the rest, got kicked in the nuts. This is because there is no such thing as "the (house) pot," the machine is just programmed to spit random multiplier on each spin.
There is always a chance to win and "The House doesn't Always Win". :p
True, the HE and "the house always win" mantra are widely misinterpreted for so long. It is applicable if the case is all players (population) vs casino in an unlimited time frame. It doesn't work like that if we talk about a sample (of gamblers) in a limited time frame. There always winners and losers.