[2021] Error being kicked out and unable to re-enter the game

A week ago, while playing my Ranked game, I got the message that the game suddenly froze and you were removed from the game, and I was redirected to the menu. I tried to rejoin many times, I started the game from the beginning, but I still could not join, every time I got a warning that you were removed from the game and I was directed to the menu. After the game was over, I was suspended under the name of Abandonment Penalty.
After my punishment was over, I re-entered and when my game was about to end, he kicked me out of the game again and the same events took place, this time I turned the pc off and on, but there was no change, I was not taken into the game and I was banned.
I've had this happen a few times in a row. And because I couldn't play, I took a break from the game and entered it again in case it was fixed with the latest update. This time I didn't get any errors and I completed my game in a healthy way. I haven't had any problems since the update until today. Today I got the same error again and got banned for 48 hours.
I've searched for what could be causing these events but haven't found anything. I just formatted my computer, there are very few programs installed and I checked these programs, I couldn't find any problems, I don't know what to do, please help.