Font Size-MT4
I think - it may be related to your Windows settings, for example -
Forum on trading, automated trading systems and testing trading strategies
Renat Fatkhullin , 2019.10.22 14:28
Instead of manually changing system fonts, use the stock global scaling feature.

Only in this mode you will be fine. Otherwise, everything will skew as in your screenshot. You want to keep the resolution high by leaving 100% system scaling and hard overriding system fonts. Thus directly mislead other programs.
We ourselves have been working in HiDPI modes for a long time and everything is fine with us. MetaTrader 5 normally supports HiDPI.