It's probably escape mechanism on your end or you want to find any excuses for your loses. And I might say that majority of us here could go on that kind of mentality, winning in the beginning and then losing in the end.
That’s more like it, because OP seems established in the forum so I don’t think he’d even play on a casino that doesn’t have a good reputation. If it was really rigged, then for sure a lot of gamblers would be complaining, but so far I haven’t seen many rig-suspicion complaints on the popular casinos here.
Maybe it’s just a phase, once that losing streak is over, it’ll pass. It’s sad, but that’s really part of gambling.
Losing streaks are mostly experienced by us players, not by the casinos.