That forehand - backhand has been in the game for almost 20 years. It's a legit move in real hockey. And, it typically only happens when you give up a breakaway. Which, is often from a bad turnover or defense playing too aggressive.
The LT exploit sucks. I hate it too. However, it can be stopped. If you know someone is doing it, you need to keep your D back to cover it.
If someone is scoring from everywhere on the ice, then they've got some skill. That's not unfair. Yes, matchmaking isn't always going to match you with someone of the same or lower skill. It's also July when the playerbase is typically lower. So, the pool of available players at this time of year are often the ones that have been playing since launch. Which probably have been playing year round for a very long time.
Goalies are identical on both ends. However, the team with the better defense means their goalie sees less shots. Goals trickle in off goalies int he real world as well. Muffins will go in, seemingly random shots have been known to find the back of the net. Hockey is a dynamic sport with a lot of lucky, or unlucky, bounces. If you are constantly finding yourself on the losing side, that has more to do with how your team is playing than one goalie being better than the other.
I'm not saying the game is perfect by any means, but it's fair for both sides. There's always going to be a skill gap and that's intended.