Played thousands of hours in casinos. Saw some asshole show down cards to someone still in the hand, stuff like that, but never anything I thought was collusion.

Plenty of other angles, though.

Do you think I can't exploit that after buying the history of millions of hands it played on some shady website.

Having a poker solver isn't enough. Let's say you play tournament poker, just having a basic understanding of concepts like ICM give you a massive edge. Let's say you take it a step further and understand concepts like "future game" and actually study them using tools, you're edge has expanded further.

There are a bunch of charts out there that tell you what hands to go all in with if you have 15bbs or fewer. None of those charts take into account ICM. Also how do you adjust the charts if your opponents are calling with too many hands? How do you adjust them if they call with too few hands?

Let's say we are just talking about cash game poker, it's not enough to have a solver, you need to understand how to actually study with the solver. People try to use them like a cheat sheet that tells you what to do, not understanding that a slight change to the inputs of the solver can drastically change the output. The purpose of a solver is to understand how different ranges interact at different stack depths on different boards.

ie: Playing 100bbs deep, on a KK3 flop with a flush draw, what hands should i check or bet as the preflop raiser? What happens if that 3 is a 7? What if it's a J? What if it's 33K instead of KK3? What if I'm 200bbs deep instead of 100? What if the opponent calls too much? What if they call too little?

There are multiple tools on the market that solve preflop all-in game for multiway pots with ICM and more advanced chip utility models. Those are very easy to solve you don't even need a chart (on the fly solving is fast enough on a laptop). You can also solve them with adjustments for certain players.