CapnZapp
Legend
The game should not only work when you "play it my way".Solo encounters work fine, but you have to run them differently... less as dumb meat boxes and more as thinking bad guys. They don't make it to where they are by being meat shields, they obviously have developed some sort of capabilities and tactics. Play them that way![]()
D&D aims to support the beers and pretzels crowd too.
It is a reasonable expectation it should support the common trope of the Big Bad Evil Guy that faces the whole party alone.
And 5th edition simply don't meet that expectation. At high level the ability of solos to challenge the party break down completely - as in, they would need WAY more hit points, WAY better defenses, and especially WAY more tricks up their sleeves.
The high level D&D battlefield is a very tricky place to be, and you are simply outclassed if you don't have a few special tricks to confound or surprise the players with. In this area, 5th edition is considerably weaker than 3e or 4e.