The thing is that what we tend to see as a "conspiracy" is quite the natural progression of events in the footballing world
1)Barca is a team filled with outrageously skilled players. Even their "blue collar players" like Busquets, Alba and Mascherano, are very technical for the requirements of their positions.
This is not to talk about Messy, Sabre-Tooth and
Natalia (MSN)
When you assemble a team of such talented players, they tend to get the benefit of the doubt because a referee would tend to think "maybe this no-named defender did foul Superstar Barca player X"
2) As a result of the ensemble, Barca have become very very financially lucrative and will garner the most views from the normies and that casual fans (the largest segment of any fan base....prepare yourselves for an influx of "Milan 4 lyf bruh" the second we start winning shit again )....Hence it is in FIFA's and UEFA's best interests to keep them on the pitch for as long as possible: i)more adds will be shown ii) more Messi/Neymar/Suarez shirts sold iii)More photo-ops with celebrities like Shakira etc
It just makes IMMENSE financial sense to keep Barcelona in competitions for as long as possible
3) Items 1&2 drive a vicious cycle that propagate more refereeing favour and less sensitization to the actual bias going on in the minds of the "neutral" fans and indeed the Barca noobz. If you've ever had an argument with 99.99% of Barcelona fans ANYWHERE - the vast majority never even consider a bias or favour, let alone something more sinister like a conspiracy.
4) A secondary point is the as-yet unproven but totally plausible influence of Nike and Qatar. I don't and can't verify any of it....but it's not far fetched to see how this could or would happen...especially if the rumours of Nike leaning on the management of the Brazil team to get their way etc.
Put together , points 1-3 actually are tantamount to a conspiracy....but it may have happened organically as opposed to mustache twirling villains in UEFA/La Liga and Fifa