Let's see how long it will last, if it's caused only by one coin, it shouldn't be that long.
Anyone here who can give a solution to this issue?
Obviously migrate to other chain, just like few months ago where many centralized exchanges start to adopt lightning network.
try to use a bitcoin wallet like electrum which support RBF, adjust your transactions to the lowest priority
The fee estimation by Electrum isn't really accurate, since you have an option to adjust the fee by yourself, it's better to not use such "low, medium or high priority".