Your opponents can't impact your connection. You might check out the following articles to minimize connection related issues.
https://support.chess.com/en/articles/8652402-how-can-i-optimize-my-online-chess-performance
https://support.chess.com/en/articles/8584209-how-do-i-fix-my-disconnect-lag-issues
That said, public accusations are not allowed, even if a member did something against the TOS. In that case you should directly report to staff.
https://support.chess.com/en/articles/8562517-how-do-i-report-someone
[removed -- MS] is a cheat stopping me from moving until im down to 913 on a 10 minute game then he wins when the time gets to 859 he cheat to get games he should be kick out of chess for good