If you play solo, no one owes anything to anyone. You must be aware of this. If you fail to contact allies, your play is your responsibility. It would help if you were four times more accurate and restrained when playing solo. Partners may not tell you information about the enemy, so being vigilant about every little thing is very important. Just because your allies don't help you doesn't mean you shouldn't support them.
There is no room for pride in this game. You need to help allies under challenging moments for your team to have at least some superiority over the enemy during the round. To win solo, you must take every situation seriously with a cool head. In this case, your attention should be focused mainly on your game.
Frequently, positions are picked even in the lobby. Be careful with quick-tempered people. If you do poorly in your position and calmly tell the team about it, there is a higher chance that the allies will treat you with understanding and change roles with you. In order to win the game solo, you should always be closer to the center of the map. You have to be mobile and adaptable to every situation; for this, you need to be closer to the center.
If everything is not so wrong with the allies, communicate. If someone tries to insult another partner, shout - do not get into a quarrel or try to fix everything calmly. Try to find an approach to each ally, and then they will become more loyal to you. If you don't listen to your supporters, they won't listen to you, you will anger everyone, and you can't expect a good attitude towards yourself. Treat your allies the way you want to be treated. Give information about enemies, warn about your actions, offer your ideas and listen to the suggestions of allies.
The most crucial aspect of the game is the solo. You need to be sure of your skills and craftsmanship. Regular individual training, shooting training, smoke, fire, and flash grenades on different maps. Your play greatly influences your allies' confidence in you and your self-confidence. If you are an order of magnitude stronger than your opponents, you can win solo, and if you combine this with a team game, you are guaranteed victory.
You need to limit your choice of cards to 3. This way, you can come to steady progress. On one map, you will get tired of playing, and your morale will deteriorate, and if you play on absolutely all maps, you will constantly get confused between players who feel confident on this map. If you are tired of a map - remove it from the map pool and add another map. Play like this for a week to get used to the new map and its geometry.