this is a question with a thousand answers but I think a good baseline to start from is that 5e in particular just has famously terrible combat
good TTRPG combat can exist, and be very fun, but it needs to be willing to sever itself from D&D design philosophy, which is often a bridge too far
Kay F. Atkinson - Perfect Killer Bodies out Nov. 10
Can we talk about combat in TTRPGs? Does anyone actually like it?
I used to DM a *lot* of 5e, and the last campaign I ran I ended up house-ruling that all attacks hit, like Into the Odd. I was really grasping at straws because I was SO sick of slogging through combat.