1) Sure, no problem with private individual companies sharing their tech with other companies/competitors via licensing or "voluntary" joint-venture; or seeking legal remedy to get compensated or to ban further infringement. This is perfectly fine in a functioning market. In China's case, however, we are talking Chinese gov't forcing compulsory terms in negotiation between private companies and actively restricting market access conditioned on tech transfer from private foreign companies to local companies. And by refusing to enforce IPR of foreigners, preventing any legal remedy. In other word, anti-market.
That's also why Japanese + Korean who hold 80% of all ACTIVE lithium ion battery patents are pursing legal actions OUTSIDE China, in neutral regions such as the EU. For instance, Japan + Korea patent pool, Tulip Innovation, in Hungary started enforcing their IP this year and already won significant legal victories and sales injunctions in Germany. Sunwoda, EV battery suppliers to Dacia, considered a low-hanging fruit of China's battery industry, was the first to go; and there wil be many more to come, such as CATL/BYD protected by China's "corruption," to borrow your word, aren't too safe in functioning markets outside China where IPR is enforced.
You seem very hung up on the fallacy of numbers, as if benefiting 50 companies justifies the means. If any, that sheer number of companies demonstrates that the industry is at infant stage. And, as the industry matures, that number is likely whittle down to a dozen or fewer. Your Chinese gov't certainly does not want all 100+ EV companies still in business today, already down from nearly 500 not too long ago. In the EV battery sector, however, China's alreadu had preordained national champions all along, namely CATL/BYD, everyone else in the business is there for window dressing. Otherwise, this means very little.
Finally, no matter how much China try to fake it, everything you are describing here is called mercantilism, or nationalistic policies of protecting domestic champions from import, or foreign competition, and maximizing exports/profit -- perhaps, the 18th Century British Empire and the East India Company ring a bell for you? This isn't very compatible with the market economies outside China.
2) Not about consequences, but how we get there.
3) Again, that's what China's neo-mercantilism is.
Thank you for playing, but I suspect we are going to make any progress at this point.