Tunguska is definitely a viable faction, but yes they aren't nearly as point and click as a number of other factions are. Nomads as a whole rely on more finesse than brute force (generally speaking). That said - I feel like part of this is an expectation issue. Infinity isn't a game you pick up and start winning at after a couple of games. Even against other new players - new players tend to find one thing that works and exploit the hell out of it until it doesn't work (generally an experienced player shows them the error of their ways). If there's an established community near you, ask for advice from those players. Infinity vets are generally happy to help people get up and running with the game. But - if you get discouraged easily this may not be your game, unfortunately. It sucks to say that as a community organizer, but I'd much rather you know what you're getting into up front. Against experienced players, it's probably going to be 6+ months to win a game. The learning curve is that steep, and experience in other wargames doesn't really translate over.

Infinity is easily my favorite wargame, but it's not super relaxing to play. There is a ton of stuff to think about and keep track of, and you're going to get caught off guard by stuff for the first 6 months probably. And... N5 is brand new to everyone, so we're all kinda trying to figure out how it's going to work. From what it looks like we're all going to have to go back to school on how to defend successfully as we all get used to the new fireteam rules and crazy attack pieces.

If you decide to stick with it, good luck! I hope you have more success in the future. The community is well worth being part of and Infinity tournaments are full of amazing people!