Here are a few steps to help you succeed,
1. Be a lab monster, you really need to spend hours and hours on your character.
2. You need to learn combos for every situation, and in the process to either squeeze out the most damage possible, or put yourself at a positional advantage.
3. While the online scene may contain people that do far more scrubby tactics, it is important to learn what to do in that situation by going in the lab and recording the AI to mimic what you couldn't deal with and how to punish it and use it to your advantage.
4. If you think you are predictable then you definitely are, go to the lab and learn things that put you at advantage and can confuse your opponent. For example; if you play batman and your number one goal is J2- then sure you may win some matches against some people but then you go up against Aquaman and get destroyed by his anti air. Jump ins will probably get even weaker as people get used to it and as patches increase the effectiveness of anti airs.
5. Watch people better than you and see how they react to different situations, the best thing about fighting games is that people always come out with new tech- whether they reveal it on the forums or show it in tournaments, and if the information is out there and you don't use it then you have no one to blame but yourself.
6. This is just a game in the end, and losing is part of life. Yeah you may lose alot- but your mentality after the match determines if you will succeed or not. If someone shoots guns over and over against you and you can't beat it, or if you keep getting demolished by a tactic then put it in practice mode and figure out your options.
Also since this is TYM this thoughtful post would not be complete without this important thought
7. All Black Adam players are scumbags