Computer have ruined chess for less hardworking chess players. In the age of computer chess,intensive homework, search for theoretical novelties and even physical fitness training are must for successful chess players.
Have computers ruined chess?

Well I would think that for the last 100 years or so, anyone who has wanted to study popular chess openings and theory could have done so. computers have just made it a lot easier. But people still have to put in the time and study openings, positions. I have had access to a computer my whole life and have been to lazy to take the time to memorize openings and whatnot..so people who do that have still worked for it. As far as cheating goes, it's definently easier to cheat and that sucks. Having said all that, it would definently be cool if we all had to just come up with our own systems without help of computers or books...it's just not realistic and hasn't been for quite some time.

Nope.Not ruin but rather it changed the landscape.It evened the playing field .Everyone has an access to a database,an engine and software.
Kasparov had an enormous advantage with regards to opening preparation because he can afford a team of Gms to help him prepare for novelties.Of course,I would still say he is a monster even stripping him of his openings.But those TNs is what made him 2850,far ahead of his time.
Nowadays you could plug in Houdini after a game,You could instantly analyze where you went wrong.Opening preparation has been neutralized.Few are willing to devote ther time to a risky opening line that can be refuted the next time you use it.It's just not practical.(Unless you are Nakamura)
Magnus Carlsen understands this that is why you see him playing rare lines. because he knows everyone is booked up til the 20th move.It's also the reason why he is above everyone else right now.I believe the "new generation" will catch up to this new approach.

I feel like i have seen several articles with people claiming that computers have ruined chess since now, it appears the first 15-20 moves of a match are generally computer determined moves that are almost memorized. Are computers really "ruining" chess? or are these claims just from people who cant keep up with how the game is evolving?
Unfortunately, they have more or less dissipated the 'mystery of chess', as they are able to 'solve' most positions in a matter of minutes.
Still, at amateur level, it's possible to derive great benefits and enjoyment from chess : the pro players are the most impacted by the changes...

i personally believe that for anyone under 2600 perhaps computers have no effect. you might know that a certain 15th move gives white/black a slight edge but it's up to you to prove it. new novelties are still coming out.

not really.
chess is so much bigger than you think
this my most recent chess game on lichess, and after move 10(the game lasted more than 50 moves) the position has never been reached before online !
and at that position I was on my own with no theory.
so you see how you cannot memorize all possible positions, even if that was the case, there is "ultimate chess" which is a scary 36x36 chess variant.
so it's pretty much impossible to memorize all the game
I feel like i have seen several articles with people claiming that computers have ruined chess since now, it appears the first 15-20 moves of a match are generally computer determined moves that are almost memorized. Are computers really "ruining" chess? or are these claims just from people who cant keep up with how the game is evolving?